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RBSE Solutions

Rajasthan Board Textbook Solutions for Class 5, 6, 7, 8, 9, 10, 11 and 12

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Model Papers

RBSE Solutions for Class 9 Maths Chapter 1 Number Systems Ex 1.6

April 16, 2022 by Fazal Leave a Comment

RBSE Solutions for Class 9 Maths Chapter 1 Number Systems Ex 1.6 10

Rajasthan Board RBSE Solutions for Class 9 Maths Chapter 1 Number Systems Ex 1.6 Textbook Exercise Questions and Answers.

RBSE Class 9 Maths Solutions Chapter 1 Number Systems Exercise 1.6

Question 1.
Find:
(i) 64\(\frac{1}{2}\)
Answer:
RBSE Solutions for Class 9 Maths Chapter 1 Number Systems Ex 1.6 1

(ii) 32\(\frac{1}{5}\)
Answer:
RBSE Solutions for Class 9 Maths Chapter 1 Number Systems Ex 1.6 2

RBSE Solutions for Class 9 Maths Chapter 1 Number Systems Ex 1.6

(iii) 125\(\frac{1}{3}\)
Answer:
RBSE Solutions for Class 9 Maths Chapter 1 Number Systems Ex 1.6 3

Question 2.
Find: (i) 93/2
Answer:
RBSE Solutions for Class 9 Maths Chapter 1 Number Systems Ex 1.6 4

(ii) 322/5
Answer:
RBSE Solutions for Class 9 Maths Chapter 1 Number Systems Ex 1.6 5

(iii) 163/4
Answer:
RBSE Solutions for Class 9 Maths Chapter 1 Number Systems Ex 1.6 6

(iv) 125-1/3
Answer:
RBSE Solutions for Class 9 Maths Chapter 1 Number Systems Ex 1.6 7

Question 3.
Simplify:
(i) \(2^{\frac{2}{3}} \cdot 2^{\frac{1}{5}}\)
Answer:
RBSE Solutions for Class 9 Maths Chapter 1 Number Systems Ex 1.6 8

RBSE Solutions for Class 9 Maths Chapter 1 Number Systems Ex 1.6

(ii) \(\left(\frac{1}{3^{3}}\right)^{7}\)
Answer:
RBSE Solutions for Class 9 Maths Chapter 1 Number Systems Ex 1.6 9

(iii) \(\frac{11^{\frac{1}{2}}}{11^{\frac{1}{4}}}\)
Answer:
RBSE Solutions for Class 9 Maths Chapter 1 Number Systems Ex 1.6 10

(iv) \(7^{\frac{1}{2}} \cdot 8^{\frac{1}{2}}\)
Answer:
\(7^{\frac{1}{2}} \cdot 8^{\frac{1}{2}}\) = \((7 \times 8)^{\frac{1}{2}}\) = \(56^{\frac{1}{2}}\)

RBSE Class 12 E-English Compulsory Self Evaluation Test Papers

April 14, 2022 by Prasanna Leave a Comment

Students must start practicing the questions from RBSE 12th English Model Papers E-English Compulsory Self Evaluation Test Papers provided here.

RBSE Class 12 E-English Compulsory Self Evaluation Test Papers

Time : 2 Hours 45 min.
Max. Marks : 80

General Instruction to the Examinees :

  • Candidates must write first their Roll Nos. on the question paper.
  • All the questions are compulsory.
  • Write the answer to each question in the given answer book only.
  • For questions having more than one part, the answers to those parts are to be written together in continuity.
  • This paper is divided into four sections A, B, C and D. All sections are compulsory.

RBSE Solutions

RBSE Class 12 E-English Compulsory Self Evaluation Test Paper 1

Section – A

Question 1.
Choose the correct alternative:

(i) What is the name of the English pacifist, who was a devoted follower of Gandhiji? (1)
(a) Andrews
(b) Louis Fischer
(c) Anees Jung
(d) Alphonse Daudet

(ii) When the church-clock stuck ………………………………………. the teacher wrote his last words. (1)
(a) 10
(b) 11
(c) 12
(d) 13

(iii) Mukesh was born, in the family destined to make ………………………………………. (1)
(a) bangles
(b) pick rags
(c) nothing
(d) houses

(iv) What is the name of the month when the narrator got an instructor? (1)
(a) September
(b) October
(c) November
(d) December

RBSE Solutions

(v) The ironmaster invited the tramp to celebrate ………………………………………. with them. (1)
(a) Deepawali
(b) Christmas
(c) Holi
(d) Rakhi

(vi) Rajkumar Shukla was: (1)
(a) poor
(b) rich
(c) illiterate
(d) greedy

(vii) The wedding bands sits upon Aunt Jennifer’s ………………………………………. (1)
(a) hands
(b) legs
(c) fingers
(d) head

(viii) On seeing her mother the poet feels ………………………………………. (1)
(a) happy
(b) glad
(c) sad
(d) nothing

(ix) What are the children compared to? (1)
(a) rootless weeds
(b) a blooming plant
(c) nothing
(d) a plant full of flowers

(x) The fishermen catches ………………………………………. in the cold seas. (1)
(a) fish
(b) birds
(c) nests
(d) crabs

(xi) What removes the pall from our dark spirits? (1)
(a) Some beautiful shapes
(b) A thing of beauty
(c) Both (a) and (b)
(d) None of these

RBSE Solutions

(xii) A new teacher would come to teach ………………………………………. (1)
(a) French
(b) German
(c) Hindi
(d) English

Question 2.
Combine the sentences using the words given in brackets:
(i) Who was that man? I saw you with him. (whom) (1)
(ii) There is a cottage. A saint lives in it. (which) (1)

Question 3.
Fill in the blanks by choosing words given in brackets:

(i) She spoke …………………………………. slowly …………………………………. nobody could hear it.
(ii) …………………………………. you and he came here.
(iii) Their marriage ………………………………….
(iv) Shri Lai Bahadur Shastri …………………………………. a poor family.
(v) I am sure …………………………………. my success.
(vi) She is expert …………………………………. singing.

Section – B

Question 4.
Read the passage given belbw and answer the questions that follow:

Today, there is a lot of talk about the environment. All nations are coming to an agreement to save planet earth. We pollute the earth, we pollute the water; we also pollute the subtle environment through our negative feelings and emotions. We have become a victim of our greed and needs. We are not in control of our mind. We hear a lot about other things in life but we spend very-little time to hear about ourselves. How to handle our mind? How to be in the present moment? How to be happy and grateful? This we have not learnt. This is the most unfortunate thing. Then what is the solution? This is where we are reminded of a very fundamental”principle that – governs our environment, our mind, our emotions and our life in general. Our body has the capaetiy to sustain much longer the vibration of bliss and peace than it does negative emotions because positivity is in the centre of our existence. As with the structure of atom, protons and neutrons are in the centre of the atom and electrons constitute inly thfe periphery; the saniO is With our lives; the centre eofe of our existence is bliss, positivity and joy but it is surrounded by a cloud of negative ions. Through the help of the breath we can easily get over our negative emotions in a shoe period of time. Through meditation and certain breathing techniques, we can clear this negative cloud.

RBSE Solutions

This life has so much to offer to you. You can see this once you take some time off, rejuvenating the soul. Your soul is hungry for a smile from you. If you could give this, you feel energised the whole year and nothing whatsoever can take the smile from you.

Everyone wants to be successful in life. But without knowing what is success, you want to be successful. What is the sign of success? Just having a lot of money, is that success? Why do you think money means success? Because money gives you freedom so that you can do whatever you want. You may have a big bank balance, but, you have stomach aches, ulcers, you may have to go for bypass surgery; cant’ eat this, can’t do this, can’t do that. We expend half our health to gain wealth and then spend half our wealth to gain back the lost health. Is this success? Infact, it is very bad mathematics.

Look at the those who claim, to be successful- are they successful? No, they are miserable. Then, what is the sign of success? It is confidence, compassion, generosity and a smile that none can snatch away, being really happy and being able to be more free. These are the signs of a successful person.

Take some time off to look a little deeper into yourself and calm the mind down. Thus erasing all the impressions that we are carrying in our minds and experience the presence of the divine that is the very core of our existence.

(i) What is the most unfortunate thing? (2)
(ii) How can we get rid of our negative emotions? (2)
(iii) What is ‘Bad Mathematics’, according to the passage? (2)
(iv) What are the main signs of a successful person? (2)
(v) Find the similar word for bear and antonym for problem from the passage. (2)

Question 5.
Read the passage given below and answer the questions that follow:

Thackeray reached Kittur along with a small British army force and a few of his officers. He thought that the. very presence of the British oh the outskirts of Kittur would terrorise the rulers and people of Kittur, and that they would lay down their arms. He was quite confident that he would be able to crush the revolt in no time. He ordered that tents be erected on the eastern side for the fighting forces, and a little away on the western slopes, tents be put up for the family members of the officers who had accompanied them. During the afternoon and evening of 20th October, the. British soldiers were busy making arrangements for these camps.

RBSE Solutions

On the 21st morning, Thackeray sent his political assistants to Kittur fort to obtain a written assurance from all the important officers of Kittur rendering them answerable for the security of the treasury of Kittur. They, accordingly, met Sardar Gurusiddappa and other officers of Kittur and asked them to comply with the orders of Thackeray. T hey did not know that the people were in a defiant mood. The commanders of Kittur dismissed the agent’s orders as ho documents c ould be signed without sanction from Rani Chennamma.

Thackeray was enraged and,sent for the commander of the Horse Artillery, which was about 100 strong, and ordered him to rush his artillery into the fort and capture the commanders of Desai’s army. When the Horse Artillery stormed into the fort, Sardar Gurusiddappa, who had kept his men on full alert, promptly commanded his men to repel and chase them away.

The Kittur forces made a bold front and overpowered the British soldiers. The Kittur soldiers captured about forty persons and brought them to the palace. These included twelve children and a few women from the British officers’ camp When they were brought in the presence of the Rani, she ordered the soldiers to be imprisoned. For the women and children, she had only gentleness, and admonished her soldiers for taking them into custody. At her orders, these women and drrWfST were taken inside the palace and given food and.shelter. Rani came down from her throne, patted the children lovingly and told them that no harm would come to them.

She then sent word through a messenger to Thackeray that the British women and children were safe and could be taken back any time. Seeing this noble gesture of the Rani, he was moved. He wanted to meet this gracious lady and talk to her. He even thought of trying to persuade her to enter into an agreement with the British to stop all hosiillities in lieu of aninam (prize) ofeidven villages. His offer was dismissed with a gesture of contempt. She had no wish to meet Thackeray.

(i) How’ did Rani treat the British women and children, who were brought before her?
(ii) What happened when Thackeray’s artillery stormed into the Kittur Fort?
(iii) Why did Thackeray send his political assistants to Kittur the next day?
(iv) What did Thackeray think about the people of Kittur?
(v) Why did Thackeray wish to meet and talk to Rani?

Write the answers of the following in about 20 words:

Question 6.
In what way did Zitkala-Sa try to save her long hair? (Memories of Childhood) (1)

Question 7.
How did Sam reach Galesburg? (The Third Level) (1)

Question 8.
Narrate the ultimate end of the Tiger King. (The Tiger King) (1)

RBSE Solutions

Question 9.
What was the gardener’s reaction on giving shelter to a white man in the house? (The Enemy) (1)

Question 10.
What is Mr Lamb’s reaction to see Derry in his garden? (On the Face of ft) (1)

Write the answers of the following in about 30-40 words:

Question 11.
How did M. Hamel blame himself for Franz’s not learning French? (The Last Lesson) (2)

Question 12.
How is Mukesh’s attitude to his situation different from that of his family? (Lost Spring) (2)

Question 13.
What is specific about the tigers created by Jennifer? (Aunt Jennifer’s Tigers) (2)

Question 14.
How does the poet describe her mother? (My Mother at Sixty-six) (2)

Question 15.
What message does the poet convey through this poem? (An Elementary School Classroom in Slum) (2)

Question 16.
“Now I was only one of many little animals driven by a herder.” What were Zitkala-Sa’s feelings while saying so? (Memories of Childhood) (2)

Question 17.
What proof did Charley have that the third level really existed? (The Third Level) (2)

Question 18.
Why did the Maharaja order the Diwan to double the land tax? (The Tiger Kins) (2)

Section-C

Write the answers of the following in about 60-80 words:

Question 19.
Why did Douglas have fear of water? How did he overcome it? (Deep Water) (3)
OR
Who was Edla? How did she change the peddler’s behaviour? (The Rattrap)

RBSE Solutions

Question 20.
Why is Charnparan episode considered to be the beginning of the Indian struggle for independence? (Indigo) (3)
OR
Why was it. so difficult for the teacher to leave his school? (The Last Lesson)

Question 21.
Do you think the doctor’s final solution to the problem was the best possible one in the circumstances? (The Enemy) (3)
OR
Derry and Mr Lamb both are victims of physical impairment, but their attitudes towards life are completely different. Elaborate. (On the Face of It)

Question 22.
What was the hardest trial faced by Zitkala-Sa? (Memories of Childhood) (3)
OR
What do you think about Charley’s experience of the third level? (The Third Level)

Section-D

Question 23.
You want lady teachers for D. A. V. Public School, Jaipur. They should be M. A.M.Sc. in their subjects with first division preferably trained. Draft an advertisement to be published in the local newspaper for walk-in interview. State date, time and venue for the interview. (4)
OR
You have received an invitation from the principal and staff of Govt Senior Secondary School, Rajakhera which is going to celebrate its annual function on 6th February 20 at 03:00 p.m. Dr Pradeep Bhatia will be the chief guest of the function. Write a formal reply for not being able to accept the invitation.

Question 24.
Your school celebrated Teachers’ Day’ on 5th September. Write a report to be sent to ‘The Patrika Times.’ (4)
OR
Translate the passage into Hindi:
Now-a-days, corruption is soaring high in every sphere of society. Everyday a new scandal unfolds and makes a news in the newspaper. But the respected names associated with the same make wrong use of their power and the case gets closed before the accused is proved guilty.

Corruption is basically the degradation of moral values in human beings which ultimately has ruined the society we live in. Wealth seems to have become their only motto in life and they are ready to tell their souls for it. The restoration of old values, a big no to all the ways of achieving quick success and giving a chance to real talent can help eradicate this burning issue.

RBSE Solutions

Question 25.
We can read the news about atrocities against women everywhere. Write a letter to the editor of the Hindustan Times expressing your views. You are Sharad Chand from Jhalawar. (4)
OR
Write a letter to the Standard Book Co., Ajmer, complaining about the poor quality of books supplied to your library. You are Nikhil, Librarian of Govt Senior Secondary School, Ajmer.

RBSE Class 12 E-English Compulsory Self Evaluation Test Paper 2

Section – A

Question 1.
Choose the correct alternative:

(i) What kind Of dress was Mv Hamel wearing that day? (1)
(a) Sunday clothes
(b) School dress
(c) Wedding dress
(d) Normal dress

(ii) If the bangle makers try to get organized, they will be sent to (1)
(a) school
(b) hospital
(c) prison
(d) no where

(iii) The Y.M.C.A. pool was (1)
(a) two or three
(b) four
(C) five
(d) nine

(iv) When the rattrap seller entered the forge, who noticed? (1)
(a) Mastersmith
(b) Helper
(C) Both (a) and (b)
(d) Nobody

RBSE Solutions

(v) In Muzzafarpur Gandhiji stayed at home. (1)
(a) Professor Maikhani’s
(b) J.B.Kriplani’s
(C) Rajkumar Shukla’s
(d) Rajendra Prasad’s

(vi) Who defeated France? (1)
(a) Alexander
(b) Bismarck
(c) M. Hamel
(d) Franz

(vii) The poet saw the children… (1)
(a) sleeping
(b) weeping
(c) moving out
(d) doing nothing

(viii) At the back of the dim class is sitting. (1)
(a) an unnoticed boy
(b) by an intelligent boy
(C) a dull boy
(d) a handsome boy

(ix) What should we not do for a second? (1)
(a) cease all activities
(b) kill others
(c) destroy others
(d) all of these

(x) sprout a shady boon for sheep:
(a) Old trees
(b) Young tress
(C) Both (a) and (b)
(d) None of these

(xi) How are Aunt Jennifer’s tigers described?
(a) dynamic
(b) sleek
(c) full of strength
(d) all of these

(xii) All the ragpickers children appear like
(a) morning birds
(b) evening birds
(c) morning dogs
(d) afternoon dogs

RBSE Solutions

Question 2.
Combine the sentences using the words given in brackets:

(i) This is the man. His son is our college captain.
(ii) Can you Show me the school? You teach there.

Question 3.
Fill in the blanks by choosing words given in brackets:
(i) This stone is ……………………………………  heavy …………………………………… I cannot lift it.
(ii) I shall teach him ……………………………………  he is very weak and poor.
(iii) While walking I ……………………………………  my old friend.
(iv) Kunti could not …………………………………… with her insult.
(v) There is no way …………………………………… this forest.
(vi) She came here …………………………………… her car.

Section-B

Question 4.
Read the passage given below and answer the questions that follow:

Smoking is the major cause of mortality with bronchogenic carcinoma of the lung and is one of the factors causing death due to malignancies of larynx, oral cavity, oesophagus, bladder, kidney, pancreas, stomach, uterine cervix and coronary heart diseases.

Nicotine is the major substance present in the smoke that causes physical dependence. The additives do produce damage to the body-for example, ammonia can result in a 100-fold increase in the ability of nicotine to enter into the smoke.

cigarette smoke contains nitrogen, oxygen and toxic gases like carbon monoxide, formaldehyde, acrolein, hydrogen cyanide and nitrogen oxides. These gases are poisonous and in many cases interfere with the body’s ability to transport oxygen. Like many carcinogenic compounds, they can act as tumour promoters or tumour initiators by acting directly on the genetic make-up of cells of the body leading to development of cancer. During smoking, within the first 8-10 seconds, nicotine is absorbed through the lungs and quickly ‘moved’ into the bloodstream and circulated throughout the brain. Nicotine can also enter the bloodstream through the mucous membranes that line the mouth (if tobacco is chewed) or nose (if snuff is used) and even through the skin. Our brain is made up of billions of nerve cells. They communicate with each other by chemical messengers called neurotransmitters. Nicotine is one of the most powerful nerve poisons and binds stereo-selectively to nicotinic receptors located in the brain, autonomic ganglia, the medulla, neuro-muscular junctions. Located throughout the brain, they play a critical role in cognitive processes and memory. In high concentrations, nicotine is more deadly. In fact, one drop of purified nicotine on the tongue will kill a person. It has been used as a pesticide for centuries. Recent research studies suggest that acute nicotine administration would result in increased dopamine release from the brain, producing perceptions of pleasure and happiness, increased energy and motivation, increased alertness, increased feeling of vigour during the early phase of smoking.

RBSE Solutions

New research shows that the relationship between smoking and memory loss is the strongest in people who smoke more than 20 cigarettes each day. Smoking may speed up age related memory loss and the details are not yet clear. One of the causes of memory decline in relation to the brain function could be nerve cell death.

(i) What is the major substance present in the smoke? (2)
(ii) What does the new research show? (2)
(iii) What can be the cause of memory decline? (2)
(iv) Name the toxic gases present in the smoke of cigarette. (2)
(v) Find the similar word for ‘death’ and antonym for ‘non-toxic’ from the passage. (2)

Question 5.
Read the passage given below and answer the questions that follow:

Selfie is the latest trend in teenagers and hundreds of people are risking their lives to take a selfie which will fetch them more ‘likes’ on the social media. Famous social networking platforms encourage users to take seifies. Selfie trend is used in politics and government campaigns too. The Prime Minister of India started a ‘Selfie with Daughter’ campaign in the country which was very successful. Even the astronauts take seifies in space and it is becoming a staple diet for marketing Strategies.

When people take a selfie and post it on the social media, they get ‘likes’ and ‘shares’. It makes them feel good about themselves. People who generally don’t express themselves can show their emotions through it, All in all, it can boost the confidence of such people for some time.

Though seifies in themselves are harmless, peoples’ behaviour around them add negative connotations to them. There are hundreds of reported deaths because of seifies. People go to dangerous places such as railway lines, cliffs, building tops, dam sites, etc., to take a selfie which will give them.more ‘likes’. Sometimes, an accident happens in such places, causing the death of the person taking a selfie. However, peer pressure makes teenagers and youth take risky actions.

Is a selfie good or bad? It depends on us, how crazy we are for a selfie, how much importance we are giving to it. There is nothing bad in taking seifies, but one should not allow this addiction to take control over our senses.

(i) Which habit shouldn’t be allowed to take control over our senses? (1)
(ii) How can people, who generally can’t express themselves, show their emotions? (1)
(iii) Can taking seifies sometimes prove to be harmful? (1)
(v) Wfrrdo teenagers generally take seifies and send them? (1)
(v) Name the campaign which our Prime Minister started, as mentioned in the passage. (1)

RBSE Solutions

Write the answers tjf the following in about 20 words:

Question 6.
Why could Charley never again find the third level? (The Third Level)

Question 7.
What was the reason that the Tiger King had come very close to losing his throne?
Question 8.
Why was Dr Sadao not arrested on the charge of harbouring an enemy?

Question 9.
How does Derry enter Mr Lamb’s garden?

Question 10:
Why did Zitkala-Sa feel uncomfortable in the dining room?

Write the answers of the following in about 30-40 words:

Question 11.
Why did Saheb’s family migrate to India?

Question 12.
What is the “misadventure” that William Douglas speaks about?

Question 13.
“All I did was smile, smile and smile” – What does the poet mean by this? (4)

Question 1.
What has been described for the tall girl? (An Elementary School Classroom in a Slum) (2)

Question 15.
How will ‘Keeping Quiet’ protect our environment? ‘ (Keeping Quiet) (2)

Question 16.
How did “The World” help Charley to confirm his doubts regarding the existence of a third level? (The Third Level) (2)

Question 17.
How did the-Tiger King’s Diwan prove to be resourceful? (The Tiger King) (2)

Question 18.
What instructions did Dr Sadao give to the American soldier before leaving his (Dr Sadao’s) house? (The Enemy) (2)

RBSE Solutions

Section – C

Write the answers of the following in qbout 60-80 words:

Question 19.
The lesson ‘The Rattrapl deals with ‘the human tendency to redeem oneself from dishonest ways. Comment on this statement. (The Rattrap) (3)
OR
Why was the official inquiry commission appointed? What did the findings of the commission reveal? What was its impact on British planters? (Indigo)

Question 20.
How did Franz begin to like the school he hated earlier? (The Last Lesson) (3)
OR
“Can a god-given lineage ever be broken?” Explain this statement of Mukesh’s grandmother with reference to the lesson.

Question 21.
Which story does Mr Lamb tell Derry and why?
OR
In what way did Zitkala-Sa rebel to save her hair from being shingled?

Question 22.
What picture of the modem world rises in your mind on reading the story?
OR
What was the rumour rife in Pratibandaptiram?

Question 23.
Prepare arguments for or against the idea/topic : Commercialisation of Education.
OR
You are working for an advertising agency. Draft an attractive advertisement for a company which is launching a new toothpaste.

Question 24.
Independence Day function was celebrated in your school with pomp and show. Write a report how it was celebrated. (4)
OR
Translate the passage into Hindi:
Beti Bachao Beti Padhao’ is a government social scheme launched by the Prime Minister, Narendra Modi in order to address the gender imbalance and discrimination against girl child in the Indian society. This scheme was launched by the Prime Minister on 22nd of Janaury, in 2015 at Panipat, Haryana. This scheme is to aware people about the impprtance of girls in the society. It is to increase awareness among common people to save the lives of girl child by completely removing the female foeticide. People should celebrate the birth of their girl child and educate them with full responsibility as they do for their boy child.

RBSE Solutions

Question 25.
Govt Sr Sec. School, Pureini requires guest faculty to teach English. You are a post graduate in English with B.Ed, and an eligible candidate for the post mentioned. Draft an application. (4)
OR
Write a letter to Ajay Trading Company regarding supply of sports articles to your club.

RBSE Class 12 E-English Compulsory Self Evaluation Test Paper 3

Section – A

Question 1.
Choose the correct alternative:

(i) What is more necessary than an identity?
(a) food
(b) fields
(c) rivers
(d) water

(ii) The Y.M.C.A. pool was …. deep at the shallow end. (1)
(a) one or two feet
(b) two or three feet
(c) three or four feet
(d) nine feet

(iii) The rattrap seller compares the world to a big (1)
(a) box
(b) ball
(c) rattrap
(d) cage

(iv) Who were the members of the official commission? (1)
(a) landlords
(b) government officials
(c) Gandhiji
(d) All of these

(v) M. Hamel had served for at the same place. (1)
(a) ten years
(b) twenty years
(C) thirty years
(d) forty years

RBSE Solutions

(vi) Who is the narrator of the lesson’Lost Spring’? (1)
(a) Anees Jung
(b) Douglas
(c) Alphonse Daudet
(d) A. R. Barton

(vii) The slum children inherit… te(1)
(a) twisted bones
(b) diseases
(C) both (a) and (b)
(d) none of these

(viii)The fisher men should not (1)
(a) harm seas
(b) kill birds
(c) hurt whales
(d) hurt birds

(ix) What does the poet mean by mighty dead? (1)
(a) powerful ancestors
(b) powerful persons
(C) great person
(d) nobody

(x) Aunt Jennifer made her tigers on
(a) walls
(b) panel
(C) books
(d) roof

(xi) Why did the poet smile at her mother?
(a) to show her teeth
(b) to show her smile
(C) to hide her shyness
(d) to hide her

(xii) Piece by piece, the instructor made Douglas a perfect
(a) don
(b) swimmer
(c) runner
(d) athlete

RBSE Solutions

Question 2.
Combine the sentences using the words given in brackets:
(i) Can you remember the time? Your grandfather died.
(ii) This is the boy. All like him. .

Question 3.
Fill in the blanks by choosing words given in brackets:

(i) Rohit speaks …………………………………… fast …………………………………… she cannot be understood.
(ii) He is ill …………………………………… he works hard.
(iii) Several people …………………………………… to help her.
(iv) The capseller …………………………………… his cap.
(v) Who is knocking …………………………………… the door?
(vi) He is true …………………………………… his word.

Section-B

Question 4.
Read the passage given below and answer the questions that foHow:

One summer day in 1955, on a beach near the village of Opononi, New Zealand, 13 year old Jill Baker waded into the water tp join a friend, one of the strangest playmates the world has ever known. A torpetlo like body streaked toward her and swam between her legs, spilling her into the surf. She put her arms around the huge creature, got on its back and took a ride. Later Jill tossed a beach ball to her playmate. Rising from the water, huge mouth spread in a grin, the creature batted it back with its nose. As the game progressed, people gathered on the beach staring in amazement. Jill Baker’s playmate was a porpoise.

The ancients, who called the porpoise a dolphin, knew him as friendly. “He is the only Creature who loves man for his own sake”, wrote Plutarch. “Some land animals avoid man altogether, and the tame ones such as dogs and horses are tame because he feeds them. To the dolphin alone, nature has given what the best philosophers seek; friendship for no. advantage”. Pliny the Elder wrote of a w ild porpoise that took a boy for a ride at Hippo, a Roman settlement in Africa: Roman coins of 74 B.C. show such a scene.

Everything about the porpoise could be written in superlatives. Not a fish but an air-breathing mammal, he swims incredibly fast kills sharks, communicates with his own kind, herds fish. He may have the world’s best sonar equipment.

One scientist believes that his brain is so similar to a human being’s that he might even be taught to talk.

RBSE Solutions

(i) What has nature given to the porpoise alone? (2)
(ii) What did Jill Baker do when a torpedo-like body swam between her legs? (2)
(iii) What type of a scene is shown in Roman coins? (2)
(iv) Why did people gather on the beach? (2)
(v) Find the similar word for ‘colony’ and antonym for ‘dispersed’ from the passage. (2)

Question 5.
Read the passage given below and answer the questions that follow:

Food wastage is a sensitive issue and the bitter truth is that we do not have any law that can prevent it. The wastage of food is more prominent during weddings, festivals and other family events. On the other hand, many people in our country are witnessing hunger and starvation.

Actually, food wastage is the culmination of insensitivity. Not only the government, but also the social organisations are concerned with food wastage. Around 1.3 billion tonnes of food, which is prepared every year world-wide is wasted. Another report states that with increasing prosperity in India, people are becoming insensitive to food. The tendency to throw away food is increasing along with the ability to spend. Even today, more than 40% of food is thrown in garbage bins kept near marriage vanues in the country.

According to a report by. World Food Organisation, every seventh person in the world sleeps hungry. If this waste can be stopped, many people can be fed. Several countries in the world have enacted legislations to encourage donation of food and grocery products. France has become the first country in the world to ban the wastage of fruits, vegetables and other foods by supermarkets.

In the name of serving more and more dishes on weddings, wastage has become a tradition, and this is an undesirable act. People are spending money on weddings lavishly, resulting in greater increase in social spending on poof families. This tradition should be stopped. Even in homes, housewives should take care of this and be alert to cook food items only as per the requirement of family members.

Religions leaders and voluntary organisations should also take initiative in this direction. Children should have the feeling from the beginning that they take as much food in the plate as they need. The contribution of religion, philosophy, thought and tradition can also create a new environment in this process of change.

In Indian culture, food has been given the status of a God, but in the race of modernity, we have become so blind that leaving food uneaten jn the plate is considered as faction. The government should also consider limiting the number of guests invited at weddings as well as the number of dishes served.

RBSE Solutions

The Marriage Ceremony Act, 2006 takes into account the ban on pretence, performance and extravagance, but it is not strictly adhered to. If a new and effective law is made in this regard, it will certainly be a major reform.

(i) How can-the children contribute in stopping wastage of food? (1)
(ii) Which country in the world has made’a law to ban wastage of edibles? (1)
(iii) What does the Marriage Ceremony Act, 2006 impose a ban on? (1)
(iv) Approximitely, how much of food is thrown in garbage bins during a wedding dinner in our country? (1)
(v) What should housewives do to minimise the wastage of food? (1)

Write the answers of the following in about 20 words:

Question 6.
How did the writer indicate that Dr Sadao’s father was a very traditional conventional man? (The Enemy) (1)

Question 7.
‘There is nothing that God made that doesn’t interest me.’ How do the words reflect Mr Lamb’s philosophy of life? (On the Face of It) (1)

Question 8.
Describe the scene at the threshing floor observed by Bama on her way back from school. (Memories of Childhood) (1)

Question 9.
How is the Grand Central Station a symbol of escape? (The Third Level) (1)

Question 10.
What dispelled the Maharajas gloom? (The flger King) (1)

Write the answers of the following in about 30-40 words:

Question 11.
Why did the peddler sign himself as Captain von Stable? (The Rolltop) (2)

Question 12.
How was the commission of inquiry appointed? Whom did it consist of? (indigo) (2)

Question 13.
Why is the poet against total inactivity? (Keeping Quiet) (2)

RBSE Solutions

Question 14.
What is the message that the poet wants to convey through this poem? (2)

Question 15.
What is the central theme of the poem?

Question 16.
Dr Sadao and servants were only partly loyal to their country. Comment.

Question 17.
Why does Deny enter Mr Lamb’s garden?

Question 18.
Jiidewin said, “We have to submit, because they are strong.” What is your idea about

Section – C

Write the answers of the following in about 60-80 words:

Question 19.
How did M. Hamel look different on the day of the last lesson?
OR
What forces conspire to keep the workers in the bangle industry of Firozabad in poverty?

Question 20.
How did the instructor “build a swimmer” out of Douglas?
OR
What was the peddler’s theory of the world? How did he himself become a part of it?

Question 21.
What time did the third level indicate and how?
OR
How was the hundredth tiger killed?

Question 22.
What thoughts came to the mind of Sadao and Hana as they saw the white man?
OR
What change did Mr Lamb bring in Derry’s attitude towards life?

RBSE Solutions

Section – D

Question 23.
Write an advertisement to be published in the matrimonial columns for seeking a bridegroom for a girl. (1)
OR
an advertisement for the To let’ column giving necessary information.

Question 24.
Yon are Harish, reporter of the Times of IndiQuestion Write a repprt in about 100 words on ‘Cruelty to Animals’ (4)
0R
Translate the passage Into Hindi:
Rajasthan has a vast stretch of desert. Most of the land being devoid of plantations, soil erosion is a very common phenomenon. The soil being bare, the wind picks up speed due to the flat land and blows away the unprotected soil. Even though rain falls infrequently in Rajasthan; when it does rain, it causes a large run of surplus water that washes away the top layer of the soil as we saw during the rainy season of 2017 in some parts of Rajasthan.

The flood in Pali, Jalore and Rajsamand etc. caused a lot of soil erosion. The best step in the direction of soil conservation is planting appropriate trees. The construction of bunds to check the flow of water will also prove helpful.

Question 25.
You are Mahesh Sharma 75-A, Ranjit Nagar, Bharatpur. Write an application to the Director, Shivaji Senior Secondary School Patel Nagar, Nadbai for the post of a clerk. Say that you have read the advertisement in the Northern India Patrika. (4)
OR
Your school building is in a very miserable condition. Heavy rains have caused severe damage to it. Write a letter to the Collector of your district to take necessary action to get it repaired as early as possible.

RBSE Class 12 E-English Compulsory Self Evaluation Test Paper 4

Section – A

Question 1.
Choose the correct alternative

(i). What was the name of the river at the Y.M.C.A.?
(a) Maches River
(b) Tleton River
(c) Yakima Riyer
(d) Columbia River

(ii) The daughter of ironmaster, …………………………………… could get the rattrap seller ready to go with her.
(a) Edla
(b) Elizabeth
(c) Nils Olof
(d) Anees

RBSE Solutions

(iii) Chief commercial crop at Champaran was …………………………………… L.
(a) tea
(b) rice
(c) indigo
(d) wheat

(iv) What topic did M. Hamel teach that day after grammar?
(a) writing
(b) reading
(c) speaking
(d) singing

(v) Survival in Seemapuri means
(a) making bangles
(b) rag-picking
(C) working on tea stall
(d) working on milk booth

(vi) After taking out train the pool where did they carry to Douglas? (1)
(a) locker-room
(b) court-room
(C) hospital
(d) class-room

(vii) What kind of moment will keeping quiet be? (1)
(a) enticing
(b) beautiful
(c) both (a) and (b)
(d) nOOÉ of these

(viii) The source of ihr endless fountain of immortal drink is (1)
(a) nature
(b) books
(c) poems
(d) songs

(ix) Where wete Aunts lingers fluttering through?
(a) her wool
(b) her paper
(c) her plate
(d) her wood

RBSE Solutions

(x) The mother of the poet is compared with
(a) moon
(b) sun
(c) boys
(d) children

(xi) What tempts the children of the slum?
(a) ships
(b) sun
(c) beautiful things
(d) all of these

(xii) The old man got out an old pack of …………………………………… and played ‘majlis’.
(a) books
(b) cards
(c) tobacco
(d) note books

Question 2.
Combine the sentences using the words given in brackets:
(i) I saw Sohan. He was a bus conductor.
(ii) He had a cow. The cow supported him. .

Question 3.
Fill in the blanks by choosing words given in brackets:
(i) Do not work …………………………………… the teacher comes.
(ii) I drew my sword ……………………………………  I might defend myself.
(iii) Twill …………………………………… the business even without your help.
(iv) His case was …………………………………… in the meeting.
(v) He applied …………………………………… the post of a clerk.
(vij Do it …………………………………… March.

Section – B

Question 4.
Read the passage given below and answer the questions that follow:

For four days, I walked through the narrow lanes of the old city, enjoying the romance of being in a city where history still lives-in its cobblestone streets and in its people riding asses, carrying vine leaves and palms, as they once did during the time of Christ.

This is Jerusalem, home to the sacred sites of Christianity, Islam and Judaism. This is the place that houses the church of the Holy Sepulchre, the place where Jesus was finally laid tb rest.” This is also the site of Christ’s crucifixion, burial and resurrection.

Built by the Roman Emperor Constantine at the site of an earlier temple to Aphrodite, it is the most venerated Christian shrine In the world. And justifiably so. Heft, within the church, are the last five stations of the cross, the 10th station where Jesus was stripped of his clothes, the 11th where he was nailed to the cross, the 12th where he died on the cross, the 13th where the body was removed from the cross, and the 14th, his tomb.

RBSE Solutions

For all this weighty tradition, the approach and entrance to the church is non-descript. You have to ask for directions. Even to the devout Christian pilgrims walking along the Via Dolorosa-the Way of Sorrows-first nine stations look clueless. Then a courtyard appears, hemmed in by other buildings and a doorway to one side. This leads to a vast area of huge stone architecture.

Immediately inside the entrance is your first stop. It’s the stone of anointing: this is the place, according to Greek tradition, where Christ was removed from the cross. The Roman Catholics, however, believe it to be the spot where Jesus’s body was prepared for burial by Joseph.

What happened next? Jesus was buried. He was taken to a place outside the city of Jerusalem where other graves existed and there, he was buried in a cave. However, all that is long gone, destroyed by continued attacks and rebuilding; what remains is the massive-and impressive-Rotunda (a round building with a dome) that Emperor Constantine built.

Under this, and right in the centre of the Rotunda, is the structure that contains the Holy Sepulchre.

“How do you know that this is Jesus’s tomb?” I asked one of the pilgrims standing next to me. He was clueless, more interested, like the rest of them, in the novelty of it all and in photographing it, than in its history or tradition.

(i) According to the’narrator, why is Jerusalem famous for? (2)
(ii) Where is the’stone of amointing’situated, as mentioned in the passage? (2)
(iii) What was the narrator enjoying in the city? (2)
(iv) Which is the most venerated Christian shrine in the world? (2)
(v) Find the similar word for ‘rebirth’ and antonym for ‘tiny’ form the passage. (3)

Question 5.
Read the passage given below and answer the questions that follow:

Coronavifus disease (COVID-19) is an infectious disease caused by a newly-discovered corona virus. It spreads from animals to humans. It has become a pandemic within a short period. Most of the world’s population has come under its influence.

The virus that causes,COVID-19 is mainly transmitted through droplets-generated when an infected person coughs sneezes or exhales or spits out. These droplets are too heavy to hang on in the air and quickly fall on floors or surfaces. We can be infected by breathing in the virus if we are within a close proximity of someone who is corona positive or by touching a contaminated surface and then our eyes, nose or mouth. As the virus weakens our immunity power, many other complications are likely to develop in the human body. Some of these may prove fatal and cause death. People of all ages who experience fever, cough, associated with difficulty in breathing or shortness of breath, chest pain, loss of speech or movement, tiredness, are doubted as corona positive cases.

We should stay safe by taking simple preventions such as physical distancing, wearing a mask, regularly cleaning our hands, coughing into a tissue, keeping rooms well-ventilated and avoiding crowds and close contacts.

RBSE Solutions

Till now, there is no proper cure identified for COVID-19. Scientists and doctors are trying their hands at a number of experiments and treatment plans to control the spread of the disease.

COVID-19 vaccines have been working on and are now available in our country. An intensive vaccine drive has begun strategically under different phases. In the last ten months, we had succeded in lowering down the number of corona positive cases in India, as the vaccination drive was implemented rapidly and simultaneously. But unfortunately, the third wave of corana is appearing in India and abroad, which may prove to be even more harmful.

Tt is the result of carelessness shown by the’people. They started taking the disease less seriously. People were coming out unmasked, attending meetings, weddings, etc. Schools were also started at many places.

(i) What is the probable cause of spread of third wave of corona disease? (1)
(ii) What are the preventive measures to remain unaffected from corona? (1)
(iii) After how many weeks, the second dose of vaccini tion can be administered to the people? (1)
(iv) What are the different symptoms of corona positive cases? (1)
(v) How does COVID-19 spread among human beings? (1)

Write the answers of the following in about 20 words:

Question 6.
Who was the Tiger King? Why did he get that name?

Question 7.
What efforts did Dr Sadao and Hana make to save the Amer can soldier?

Question 8.
What is the state of Derry’s mind due to his burnt face?

Question 9.
What terrible warning did Judewin give Zitkala-Sa? How did it disturb her?

Question10.
Why could Charley not buy tickets to Galesburg?

Write the answers of the following in about 30-40 werds:

Question 11.
How did the narrator have an aversion to water?

Question 12.
Why did the peddler decline the invitation?

RBSE Solutions

Question 13.
Describe the boy sitting in the last row. (An Elementary School Classroom in a Slum) (2)

Question 14.
What does the poet advocate in the poem?

Question 15.
What image does the poet use to describe the beautiful bounty of the earth?

Question 16.
What posed the danger of job loss before the Dewan?

Question 17.
“Why are we different from other Japanese?” What does Hana mean by saying this? Question18. Why does Mr Lamb leave the gate of his house always open?

Section – C

Write the answers of the following in about 60-80 words:

Question 19.
Describe the difficulties faced by Gandhiji at Champaran.
OR
What message does the teacher want to convey in his last lesson?

Question 20.
Why should phild labour be eliminated and how?
OR
How did Douglas make sure that he conquered the old terror? (DeepWater)

Question 21.
Why did Bama stroll in the market place instead of hurrying back home? Describe the sites she enjoyed seeing there, (Memories of Childhood) (3)
OR
The modern world is full of insecurity, fear, war, worry and stress.’ What are the ways in which we attempt to overcome them? (The Third Level)

Question 22.
Describe the episode w hen the Maharaja stood in danger of losing his kingdom. How did he solve the crisis? (The Tiger King) (3)
OR
Give a character sketch of Dr Sadao. (The tiger king)

Section – D

Question 23.
You want to purchase a flat with three rooms in Malviya Nagar, Jaipur. It should preferably be on the ground floor. You can pay upto ₹ 25 lac. Draft an advefhsemient detail of your requirements.
OR
The Principal of Sunrise Globals School, Bikaner requires a receptionist for her school. Draft a suitable advertisement stating necessary qualifications and a good command of spoken Engh h. Attractive salary.

RBSE Solutions

Question 24.
You are Harish, reporter of the Times of India. There was a train robbery near Kishanpura. Write a report in about 100 words on a train robbery. (4)
OR
Translate the passage into Hindi:

‘Hard work is the key to success’, is an old but true saying which will remain valid till the endless generations to come. Many people escape from hard work and try to veil their laziness under the myths of futile thoughts. For example they base their tattered position of life and failure on destiny and turn to take a lame excuse for sitting completely idle. Even if ihe role of destiny is admitted, it doesn’t entitle anybody to stop doing his part of ‘Karma’. The food on plate cannot be eaten without the movements of hand and mouth.

Success encourages to work harder and discover sew heights. However, failures also come but they must not be taken with the spirit of a loser.

Question 25.
Along with air and water pollution, our cities arc also an attack of noise pollution. Marriage processions, DJs during1 wedding receptions, loud music from neighbourhood flats, etc. are all sources of noise which is not good for the old, the ailing and students. Write a letter to the editor of a local newspaper describing the problem and making a request to the concerned authorities to solve it. You are Karan/Karuna, M-114, Mall Road, Jodhpur. (4)
OR
You are Deepii Shah / Deepak Shah of Station Road, Alwar. Write a letter to the Municipal Commissioner of Alwar complaining. Tout the poor condition of roads in Alwar and asking for their improvement.

RBSE 12th English Compulsory Model Paper Set 9 with Answers

April 14, 2022 by Prasanna Leave a Comment

Students must start practicing the questions from RBSE 12th English Model Papers Set 9 with Answers provided here.

RBSE Class 12 English Compulsory Model Paper Set 9 with Answers

Time : 2 Hours 45 min.
Max. Marks : 80

General Instruction to the Examinees :

  • Candidates must write first their Roll Nos. on the question paper.
  • All the questions are compulsory.
  • Write the answer to each question in the given answer book only.
  • For questions having more than one part, the answers to those parts are to be written together in continuity.
  • This paper is divided into four sections A, B, C and D. All sections are compulsory.

RBSE Solutions

Section – A

Question 1.
Choose the correct alternative –

(i) What was there on the way to school where Franz saw a crowd? (1)
(a) a magic show
(b) a bulletin board
(c) a school board
(d) a juggler show
Answer:
(a) a magic show

(ii) Saheb’s family settled in (1)
(a) Dhaka
(b) Seemapuri
(c) Firozabad
(d) Nepal
Answer:
(b) Seemapuri

(iii) The Y.M.C.A. pool was – (1)
(a) dangerous
(b) unsafe
(c) safe
(d) none of these
Answer:
(c) safe

(iv) What did the peddler use to sell? (1)
(a) nest
(b) toys
(c) books
(d) rattraps
Answer:
(d) rattraps

RBSE Solutions

(v) Gandhiji’s ashram in central India is in (1)
(a) Seemapuri
(b) Champaran
(c) Sevagram
(d) Muzzafarpur
Answer:
(c) Sevagram

(vi) What was the name of topic on which M. Hamel was going to ask questions? (1)
(a) Participles
(b) Modals
(c) Passive Voice
(d) Tense
Answer:
(a) Participles

(vii) The poet was going to the airport. (1)
(a) Jaipur
(b) Cochin
(c) Delhi
(d) Jodhpur
Answer:
(b) Cochin

(viii) The children are compared to (1)
(a) rootless weeds
(b) rose plants
(c) wheat plants
(d) tea plants
Answer:
(a) rootless weeds

RBSE Solutions

(ix) In which language does the poet ask us to speak? (1)
(a) English
(b) Hindi
(c) Not any
(d) All
Answer:
(c) Not any

(x) A thing of beauty is a forever. (1)
(a) pain
(b) sorrow
(c) despondence
(d) joy
Answer:
(d) joy

(xi) Where are the tigers of Aunt Jennifer?
(a) on screen
(b) on board
(c) on wall
(d) on
Answer:
(a) on screen

RBSE Solutions

(xii) Saheb’s family came to India from
(a) Seemapuri
(b) Dhaka
(c) Delhi
(d) Firozabad
Answer:
(b) Dhaka

Question 2.
Combine the sentences using the words given in brackets:
(i) That was his fault. He told a lie. (that) (1)
(ii) Who wrote the Ramcharitmanas? Can you tell me? (who) (1)
Answer:
(i) That he told a lie was his fault.
(ii) Can you tell me who wrote the Ramcharitmanas?

Question 3.
Fill in the blanks by choosing words given in brackets:
(i) He worked hard …………….. he failed, (although/yet/so) (1)
(ii) John will go to Delhi to Jaipur, (either or/so that) (1)
(iii) Drinking his ruin, (brought about/broke with) (1)
(iv) She has after her husband’s death, (brought down/broken down) (1)
(v) Would you like to sit please? (down/up) (1)
(vi) I have been learning driving a month, (since/for) (1)
Answer:
(i) yet
(ii) either or
(iii) brought about
(iv) broken down
(v) down
(vi) for

Section – B

Question 4.
Read the passage given below and answer the questions that follow:

Marriage is an important institution of human society. In the remote past of human history, man was living and behaving like an animal. Then he was hardly ever aware of his relationship to his parents, brothers and sisters. In the biological kingdom, this primitive man was even subordinate in status to the animals, Neither did he have the strength of an elephant nor the sharp teeth and claws of the carnivore. He did not even have the hard protective hide of the rhinoceros and could not protect himself by any other extraordinary physical capability.

Nevertheless, he did possess the unique human instinct of cooperation and organization, with the help of which, he could dominate over the animals besides protecting and proliferating his own species. But in spite of this natural trait, in absence of permanent arrangements for housing, food and clothes, the primitive man was living in small groups, in large caves and on trees.

RBSE Solutions

Since in those days the institution of family had not come into existence, the relation between man and woman was different from what it is today, in modem times. There is little doubt that tradition of marriage has made a significant contribution in organization and development of human society and with the help of this institution man has been able to make significant achievements by joining much larger families and thereby enlarging fields of activities. Giving due importance to this human necessity, the Indian philosophers declared the ceremony of marriage as a great religious rite, decreeing that the bond between husband and wife be considered ever-lasting, pious in all activities of life. The couple were to participate with absolute cooperation so that their resultant contribution became many times than even their combined individual input.

This institution of family further enlarged to constitute ethnic groups, which later became the foundation stones for the various nations of the world. The tradition of marriage was adopted by people all over the world with ceremonial modifications according to local requirements and local atmosphere of the region. Nevertheless, the basic framework of the process continued to be the same in that the suitablity of the would-be husband for maiden was first ascertained by the father of the girl and on his approval, the couple was declared as man and wife after participating in some religious ceremony. While handing over the responsibilities for looking after bride (Kanya Dan), the groom was also gifted with articles of domestic requirements like eatables, clothes and kitchenware.

Nowhere in the scriptures, there is reference to the so-called tradition of pre-fixing a dowry prior to matrimony, entertaining large number of guests from the groom’s party or celebrating the event with pompous dance, music and feasts for days.

(i) How did humans live in the remote past? (2)
(ii) What contributed in the development of human society? (2)
(iii) What is not mentioned in the. scriptures? (2)
(iv) What is Kanya Dan? (2)
(v) Find the similar word for defensive and antonym for output from the passage. (2)
Answer:
(i) Humans lived like animals in the remote past.
(ii) Marriage contributed in the development of human society.
(iii) The so-called tradition of pre-fixing a dowry prior to matrimony, entertaining large number of guests from the groom’s party or celebrating the event with pompous dance, music and feasts for days are not mentioned in the scriptures.
(iv) Handing over the responsiblities for looking after the bride is called Kanya Dan.
(v) protective, input

RBSE Solutions

Question 5.
Read the passage given below and answer the questions that follow:

Science not only provides knowledge about nature but also provides means for controlling nature. So, besides general ideas, science also affects practical affairs and everyday life. Perhaps the most obvious example concerns transport. Up to the end of the eighteenth century, transport on land differed very little from what it had been in Roman times. A Roman officer in the second century could get from London to New York just about as quickly and comfortably as an eighteenth-century gentleman. Owing to the compass and to improved design of ships, sea transport had improved a little, but not much. Then came the invention of the steam – engine, and its improvement, which I was dependent on the general scientific knowledge of the time.

Steamships, and railways with steam engines, completely changed the business of travel and of the transport of goods. The internal combustion engine, again based on the scientific study of heat and how it is generated: by gas explosions, made possible first the motor – car and the diesel engine and then the aeroplane. Now people are talking of the; possibility of flying at five hundred miles an hour or more by means of rocket propulsion in the thin higher layers of the atmosphere. It is interesting to note down the highest speeds possible for, land, sea and air travel every ten years from 18(2)0 to the present day.

Similarly with communications. Not only did the steam engine, and then the aeroplane, speed up the sending of letters and newspapers, but the discoveries about electricity made possible first the telegraph, then the telephone, then wireless, and now television.

As a result of science, the possibilities of tying the world together by quick transmission of facts and ideas have completely changed in less than a century.

Or again, think of the lighting of houses and streets, candles – oil lamps – gas – are lights – electric filament lamps – now vapour discharge lighting. Or sanitation – all it means to have pure water in every house. Or the differences between a surreal r operation before – an aesthetic and aseptic method, and a surgical operation today. Not only has science provided all kinds of new substances and machines and sources of power, but in doing so it has changed our everyday life.

However, we should not imagine that the practical applications of science are always necessarily a benefit. We have already described how recklessly men are exploiting the resources of nature. This waste would not be possible but for the applications of science. Our industrial civilization makes new demands for sources of power mining responds with increased activity and new scientific methods for getting coal and oil more cheaply and more quickly. Improved transport brings men more easily into the remote parts of the earth, and enables them to kill the wild creatures. The applied science which makes it possible for everyone to have their morning newspaper causes the reckless cutting down of forests to provide wood for making paper from.

RBSE Solutions

(i) How are we exploiting the resources of nature? (1)
(ii) How do we get paper? (1)
(iii) What does science provide us? (1)
(iv) What made a motor – car possible? (1)
(v) What has changed our everyday life? (1)
Answer:
(i) We are exploiting the resources of nature recklessly.
(ii) We get paper from wood.
(iii) Science provides us both knowledge about nature and means for controlling it.
(iv) Internal combustion engine made a motor-car possible.
(v) Science has changed our everyday life.

Section – C

Write the answers of the following in about 20 words:

Question 6.
Why do the people in the modem world want to escape? (The Third Level) (1)
Answer:
The modern world is full of insecurity, fear, wars and worries. So, the people want to escape from it.

Question 7.
Why did the British officer want to kill a tiger? Could he kill the tiger? (The Tiger King) (1)
Answer:
The British officer was fond of hunting tigers. He could not kill the tiger because the Tiger King refused permission.

Question 8.
Why was Dr Sadao not sent to the battle – field? (1)
Answer:
Sadao was perfecting a discovery and the old General might need an operation any time. So, Sadao was not sent with the troops.

RBSE Solutions

Question 9.
Who was the master of the garden? What type of a person was he? (On the Face of It) (1)
Answer:
Mr Lamb was the master of the garden. Ha was a fellow who loved life. Though one of his legs was of tin, he never suffered from inferiority complex.

Question 10.
Why did Zitkala – Sa feel her freedom to have been lost? (Memories of Childhood) (1)
Answer:
In the chapter ‘Memories of childhood’ Zitkala-Sa was forc.ed to get her hair cut against her will. Therefore she felt her freedom was lost.

Write the answers of the following in about 30 – 40 words:

Question 11.
What did Franz notice that was unusual about the school that day? (The Last Lesson) (2)
Answer:
There used to be a great hustle and bustle in the school on normal days but that day there was silence all about the school. No noise of the opening and closing of desks and of lessons being repeated loudly in unison could be heard.

Question 12.
What does the reference to chappals in ‘Lost Spring’ tell us about the economic condition of ragpickers? (The Last Lesson) (2)
Answer:
The author has seen children walking barefoot without any chappals in cities and on village roads. Most people think that it is not lack of money but a tradition to stay barefoot but the writer thinks otherwise. She considers that it is the perpetual state of poverty that makes them walk barefoot.

Question 13.
Why are the young trees described as ‘sprinting’?
Answer:
By describing ‘sprinting1 trees, the poet presents comparison and contrast in the poem. It is between old age and young age. Old age is lifeless and pale while young age is full of joy and energy.

Question 14.
How do the children of the elementary school in a slum look like? (An Elementary School Classroom in a Slum) (2)
Answer:
They look grim. Their faces are pale and lifeless. Their disorderly hair falls on their faces like rootless weeds. Their bones peep through their skins. Yet a little boy has dreams in his eyes.

RBSE Solutions

Question 15.
What will counting upto twelve and keeping still help us achieve? (Keeping Quiet) (2)
Answer:
Counting upto twelve and keeping still will give us some moments of peace to feel the beauty of life, introspect our ownselves and restore energy to move in the right direction.

Question 16.
What does the third level refer to? (The Third Level) (2)
Answer:
The third level at the Grand Central Station of New York does not really exist. There are only two levels at the station. The third level is a product of Charley’s imagination. He finds it as a place where he can escape from the modem world of insecurity and fear.

Question 17.
Who was the Tiger King? Why did he get that name? (The Tiger King) (2)
Answer:
The Tiger King was the king of Pratibandapuram. At the time of his birth, royal astrologers predicted his death to be caused by a tiger. When he grew up, he hunted ninety-nine tigers. For killing so many tigers, he got the name Tiger King’.

Question 18.
Who was Dr sada? Where was his house? (The Enemy) (2)
Answer:
Dr Sadao was a famous doctor in Japan. He had studied surgery and medicine in America. His house was built on a spot on the Japanese coast. It was set upon a narrow beach that was outlined with bent pines.

RBSE Solutions

Write the answers of the following in about 60 – 80 words:

Question 19.
How did the instructor ‘build a swimmer” out
OR
Compare and contrast the character of the
Answer:
Douglas was scared of water. The instructor had to put in extra effort to make him a complete swimmer. The instructor used a rope and pulley to train Douglas. He held on to the end of the rope and made Douglas go back and forth across the pool over and over again. Whenever the instructor relaxed his hold on the rope, the author would get extremely frightened. The terror of water began to get diminished within three months. That is how the instructor, made Douglas a swimmer.
Or
The ironmaster’s daughter is more persuasive than him – We are introduced with the ironmaster and his daughter when they try to take the peddler with them to their house. The former fails to persuade him while his daughter succeeds in doing so.

The daughter is more kind and generous Edla is kind and generous to the poor. She wants to give the peddler happiness and peace of mind. Her father threatens the peddler as soon as he comes to know that he is not the captain.

Daughter is greater observer – The daughter is a greater observer than her father. Seeing the peddler, she observes that he is afraid. Her father does not pay attention to all these things.

Question 20.
How did the episode change the plight of the peasants? (Indigo) 3
OR
Why does the teacher feel that they all have a great deal to reproach themselves with? (The Last Lesson)
Answer:
The peasants in Champaran were sharecroppers. The British landlords had an agreement with them. The peasants were to grow indigo on 3/20 or 15 per cent of their land. They were forced to give their whole indigo crop as rent to the British landlords. With the advent of synthetic indigo, the British landlords asked for compensation from the peasants to free them from the agreement. Gandhiji led them in their struggle to get their right and succeeded too. They also learned to behave courageously. The British landlords were so much demoralised that they abandoned their estate which was given to the peasants and indigo sharecropping disappeared.
OR
The teacher is teaching his last lesson. In his opinion, nobody was serious enough to study French. Children did not take their lesson seriously. Their parents preferred to put them to work on a farm oi: at the mills, so as to get a little more rrloney. The teacher feels that he was equally guilty. He had often sent the students to water his flowers instead of learning their lessons. Also he often gave them holidays when he wanted to go fishing. Now he wants his entire nation to keep their language alive.

RBSE Solutions

Question 21.
What is it that draws Derry towards Mr Lamb in spite of himself? (Oil the Face of It)
OR
What kind of insults do the people of so-called lower castes have to bear? How can they overcome this situation? (Memories of Childhood)
Answer:
Derry has an acid burnt face. He hates people staring at him and therefore avoids their company.

He suffers from a kind of inferiority complex. Mr Lamb himself is handicapped in one leg. But he seems to have ho inferiority complex. Instead, he loves meeting people. Mr Lamb’s personality is an example for him to live life without feeling ashamed of himself. All this draws Derry to Mr Lamb. He seems to be loving his company.
OR
The people of so-called lower castes have to face discrimination in social life. They have to bear insult at every step. They have to do petty jobs for the upper caste people without getting any wages for it. Contact with them is avoided by the so-called upper caste people. These people can overcome this situation by studying and making progress.

Question 22.
How is the Grand Central Station a symbol of escape? (The Third Level) (3)
OR
Why did the Tiger King decide to kill a hundred tigers? Describe the efforts he made to attain his target. (The Tiger King)
Answer:
Yes, I think the third level was a medium of escape for Charley. He was living with the fear, worries, stress and insecurity of modem life. He wished to live in a peaceful world that existed long before. So, an imagination of the third level cropped up in his mind. He found this to be a place that existed much before the two world wars. He thought of buying tickets from there to a place of the past. He thought of living there away from the hue and cry of the modem world.
OR
The Tiger King decided to kill a hundred tigers because it was predicated that he would be killed by the 100th tiger. He, then, spent much time and made many efforts to fulfil his target of killing a hundred tigers. He stayed in the forest for many days and nights. The Tiger King even married a girl frorfl another kingdom which had a large tiger population, when tigers became extinct in his own kingdom.

RBSE Solutions

Section – D

Question 23.
Suppose you have lost your watch. Write a notice requesting the students to return it to you if anyone has found it. (4)
OR
Recently you have started Yoga classes for women. Draft an advertisement for publication in a newspaper giving details.
Answer:
Govt Senior Secondary School, Kaman
6 August, 20–
Notice
Lost ! Lost ! Lost !
I have lost my wrist watch on the school playground today morning. It is of Titan make with a white dial and steel chain. Tea and friendship are promised to the person who has found it and will return it to me.

Anish Kumar
Class XII A
OR
Yoga Classes
Yoga classes for women have been started in Ram Niwas Hall of the town. Yogic exercises are taught practically by experts. Some time for meditation is also given. Timings from 6 am to 7.30 am. Contact-Savita Jain, Director, Yoga Classes, Pushkar.

Question 24.
A heavy flood takes seven lives in your neighbouring village. Write a report on it with the help of given outline. (4)

(continuous rain – dam – broke – people – homeless – houses – collapsed – electricity failed – cattle – drowned – relief work – ambulance – rescue team)
OR
Translate the passage into Hindi:
General Bipin Rawat was the first Chief of Defence Staff of the Indian Armed Forces.

RBSE Solutions

He was a four-star general of the Indian Army. He served as CDS from 1 January 2020 to 8 December 2021. Bipin Rawat was bom in Pauri District of Uttarakhand on 16 March 1958. He belonged to the family that had been serving in the Indian Army for multiple generations. His father was a lieutenant General. In his career of 43 years, General Rawat received numerous honours and awards like: the Param Vishisht Seva Medal, Uttam Yudh Seva Medal, Ati Vishisht Seva Medal, Yudh Seva Medal, Sena Medal, Vishisht Seva Medal. On 8 December 2021, he was killed in a helicopter crash in Coonoor, Tamilnadu.
Answer:

Devastating Flood Takes
Seven Lives
(Isha, a reporter)

Gangdhar: 25 July Yesterday a heavy and continuous rain took the life of seven persons. It rained for two days. The Choti Kalisind River was flooded and the dam broke. The water of the river entered the nearby village, Gangdhar. The homes on the bank of the river drowned in the flood. People became homeless. Many houses collapsed due to flood and heavy rain. People took shelter in the houses situated on the high area. Several cattle drowned. It is estimated that about seven people were missing and feared dead. Electricity failed due to flood in the area. Many N.G.O.’s and government agencies started rescue work and relief work.
OR

Question 25.
You are Mahesh Sharma 75 – A, Ranjit Nagar, Bharatpur. Write an application to the Director, Shivaji Senior Secondary School Patel Nagar, Nadbai for the post of a clerk. Say that you have read the advertisement in the Northern India Patrika. (4)
OR
Write a letter to the editor of the ‘Dainik Bhaskar’ complaining against noise pollution in your area giving suggestions to reduce it.
Answer:
75-A Ranjit Nagar
Bharatpur
27 August 20…
The Director
Shivaji Senior Secondary School
Patel Nagar
Nadbai
Subject : Application for the post of clerk

Sir,
With reference to your advertisement in the Northern India Patrika dated 25 August 20… for the post of a clerk, I beg to offer my candidature for the same and submit my resume for your kind consideration. If I am given a chance, I shall do my best to give you full satisfaction in the field of my work.

Hoping to receive an early favorable decision.

Yours faithfully
Mahesh Sharma
Enclosed – Resume

RBSE Solutions

Resume

Name : Mahesh Sharma
Father’s name : Mr Harish Sharma
Date of Birth : 15 March 2000
Nationality : Indian
Marital Status : Married
Educational Qualifications :

  • High School from UP Board, Allahabad with 68 percent marks in the year 2014.
  • Senior Secondary from Board of Secondary Education Rajasthan, Ajmer with 72 percent marks in the year 2016.
  • B. Com from Rajasthan University, Jaipur with 80 percent marks in the year 2019.

Other Qualifications : Typing English 35 words per minute Typing Hindi 30 words per minute
Activities :

  • Member of District Hockey Team.
  • Secretary, College Union

Experience : Working as a clerk in a local private senior secondary school for two years.
OR
17 Bihari Pura
Duasa
10 March 20–
The Editor
The Dainik Bhaskar
Dausa

Subject : Regarding nuisance caused by loudspeakers during exams

Sir,
Through your esteemed daily I want to draw the attention of the authorities concerned that nowadays the examination of the Board of Secondary Education, Rajasthan is being conducted. The loudspeakers keep blaring throughout the night due to which we are unable to prepare ourselves for the examination, since the noise interferes in our studies. If these loudspeakers continue to create disturbance, we may fail in the examination. It is, therefore, earnestly requested to put a ban against the use of loudspeakers during our examination days. I hope that the authorities concerned will pay attention to solve this genuine problem of the students.

RBSE Solutions

Yours faithfully
Hari Singh

RBSE Class 12 E-Chemistry Self Evaluation Test Papers in Hindi

April 13, 2022 by Prasanna Leave a Comment

RBSE Class 12 E-Chemistry Self Evaluation Test Paper 4 in Hindi 8

Students must start practicing the questions from RBSE 12th Chemistry Model Papers E-Chemistry Self Evaluation Test Papers in Hindi Medium provided here.

RBSE Class 12 E-Chemistry Self Evaluation Test Papers in Hindi

पूर्णांक: 56
समय: 2 घण्टा 45 मिनट

परीक्षार्थियों के लिए सामान्य निर्देश :

  • परीक्षार्थी सर्वप्रथम अपने प्रश्न-पत्र पर नामांक अनिवार्यतः लिखें।
  • सभी प्रश्न करने अनिवार्य हैं।
  • प्रत्येक प्रश्न का उत्तर दी गई उत्तर-पुस्तिका में ही लिखें।
  • जिन प्रश्नों में आन्तरिक खण्ड हैं, उन सभी के उत्तर एक साथ ही लिखें।
  • प्रश्न का उत्तर लिखने से पूर्व प्रश्न का क्रमांक अवश्य लिखें।

RBSE Class 12 E-Chemistry Self Evaluation Test Paper 1 in Hindi

खण्ड – (अ)
वस्तुनिष्ठ प्रश्न

प्रश्न 1.
निम्नलिखित प्रश्नों के उत्तर का सही विकल्प चयन कर उत्तर पुस्तिका में लिखिए- (1)
(i) प्लास्टिक है-
(अ) आयनिक ठोस
(ब) धात्विक ठोस
(स) सहसंयोजी ठोस
(द) इनमें से कोई नहीं।

(ii) भर्जन का मुख्य कार्य है- (1)
(अ) वाष्पशील पदार्थ को हटाना
(ब) ऑक्सीकरण
(स) अपचयन
(द) धातुमल बनाना

(iii) Na[Ag (CN)2] लवण है. (1)
(अ) द्विक लवण
(ब) सरल लवण
(स) जटिल लवण
(द) अम्लीय लवण

RBSE Class 12 E-Chemistry Self Evaluation Test Papers in Hindi

(iv) आइसोप्रोपिल क्लोराइड का IUPAC नाम है. (1)
(अ) 2-क्लोरो प्रोपेन
(ब) 1-क्लोरो प्रोपेन
(स) क्लोरो प्रोपेन
(द) 2-क्लोरो 2-मेथिल प्रोपेन

(v) C2H5Br + KOH (जलीय) से प्राप्त होता है- (1)
(अ) C2H5OH
(3) CH2 = CH2
(स) C2H5 – O – C2H5
(द) C2H6

(vi) फॉर्मेल्डिहाइड ग्रिगनार्ड अभिक्रिया द्वारा प्राप्त होता है- (1)
(अ) प्राथमिक ऐल्कोहॉल
(ब) द्वितीयक ऐल्कोहॉल
(स) तृतीयक ऐल्कोहॉल
(द) डाइहाइड्रिक ऐल्कोहॉल

(vii) नैनोपेप्टाइड है- (1)
(अ) ऑक्सीटोसिन
(ब) वेसोप्रेसिन
(स) दोनों
(द) इनमें से कोई नहीं.

(viii) RNA में नहीं पाया जाता है- (1)
(अ) यूरेसिल
(ब) ऐडीनीन
(स) ग्वानीन
(द) थायमीन

(ix) सबसे मीठी शर्करा है – (1)
(अ) ग्लूकोस
(ब) फ्रक्टोस
(स) सुक्रोस
(द) लैक्टोस

प्रश्न 2.
रिक्त स्थान की पूर्ति कीजिए
(i) मैलेकाइट ___________ का अयस्क है। (1)

(ii) निस्तापन क्रिया का मुख्य कार्य ___________ होता है। (1)

(iii) f-ब्लॉक के तत्व ___________ तत्व कहलाते हैं। (1)

(iv) EDTA ___________ लिगैण्ड है। (1)

RBSE Class 12 E-Chemistry Self Evaluation Test Papers in Hindi

प्रश्न 3.
अतिलघुत्तरात्मक प्रश्न
(i) किन्हीं दो अन्तराकाशी रिक्तियों के नाम लिखिए। (1)

(ii) ताप बढ़ाने पर गैसों की द्रवों में विलेयता में हमेशा कमी आने की प्रवृत्ति क्यों होती है? (1)

(iii) एक ठोस विलयन का उदाहरण दीजिए जिसमें विलेय कोई गैस न हो। (1)

(iv) 673K ताप पर C तथा CO में से कौन-सा अच्छा अपचायक है? (1)

(v) सिल्वर परमाणु की मूल अवस्था में पूर्ण भरित d-कक्षक (4d10) हैं। आप कैसे कह सकते हैं कि यह एक संक्रमण तत्व है? (1)

(vi)
RBSE Class 12 E-Chemistry Self Evaluation Test Paper 1 in Hindi 1
का IUPAC नाम लिखिए। (1)

(vii) निम्न को PK, मान के घटते क्रम में लिखिए: (1)
C2H5NH2, C6H5NH CH3,(C2H5)2NH तथा C6H5NH2,

(viii) निम्न अम्ल-क्षारक अभिक्रिया को पूर्ण कीजिए: (1)
(C2H5)3 N + HCl →

खण्ड – (ब)
लघूत्तरात्मक प्रश्न

प्रश्न 4.
अर्द्ध-चालक क्या होते हैं? निम्नलिखित को p-प्रकार या n-प्रकार के अर्द्ध-चालकों में वर्गीकृत कीजिए (¾ + ¾ = 1½)
(अ) In से डोपित Ge
(ब) p से डोपित Si

प्रश्न 5.
चालक और रोधी में अन्तर स्पष्ट कीजिए तथा फ्रेंकेल दोष को परिभाषित कीजिए। (1½)

प्रश्न 6.
टिप्पणी कीजिए- (¾ + ¾ = 1½)
(अ) मोल अंश
(ब) मोलरता

प्रश्न 7.
द्रव्यमान की दृष्टि से 25% विलयन के 300 ग्राम तथा 40% के 400 ग्राम को आपस में मिलाने पर प्राप्त मिश्रण का द्रव्यमान प्रतिशत सान्द्रण ज्ञात कीजिए। (1½)

प्रश्न 8.
ताप का वेग स्थिरांक पर क्या प्रभाव होगा? इससे सम्बन्धित आरेनियस समीकरण की सहायता से समझाओ। (1½)

प्रश्न 9.
निम्नलिखित अभिक्रियाओं के वेग व्यंजकों से इनकी अभिक्रिया की कोटि तथा वेग स्थिरांकों की इकाइयाँ ज्ञात कीजिए- (¾ + ¾ = 1½)
(अ) CH3CHO(g) → CH4(g) + CO(g) वेग = K[CH3CHO]3/2
(ब) C2H5Cl (g) → C2H4(g) + HCl (g) वेग = K[C2H5Cl]

प्रश्न 10.
+3 ऑक्सीकरण अवस्था में ऑक्सीकृत होने के सन्दर्भ में M2+ के यौगिक Fe2+ के यौगिकों की तुलना में अधिक स्थायी क्यों हैं? (1½)

प्रश्न 11.
निम्नलिखित के इलेक्ट्रॉनिक विन्यास लिखिए- (¾ + ¾ = 1½)
(अ) Cr3+
(ब) Pm3+
(स) Cu+
(द) Le4+

प्रश्न 12.
क्रॉस ऐल्डोल संघनन का वर्णन अपने शब्दों में कीजिए। (1½)

प्रश्न 13.
ऑर्थोनाइट्रोफीनॉक्साइड आयन की अनुनादी संरचना बनाइए। (1½)

प्रश्न 14.
निम्नलिखित को पूरा कीजिए- (1½)
RBSE Class 12 E-Chemistry Self Evaluation Test Paper 1 in Hindi 2

प्रश्न 15.
समतुल्य आण्विक भार वाले हाइड्रोकार्बन की अपेक्षा ऐल्कोहॉल जल में अधिक विलेय होते हैं। इस तथ्य को समझाइए। (1½)

खण्ड – (स)
दोर्ष उत्तरीय प्रश्न

प्रश्न 16.
(अ) 14C के रेडियोएक्टिव क्षय की अर्द्ध-आयु 5730 वर्ष है। एक पुरातत्ववेता की लकड़ी में जीवित वृक्ष की लकड़ी की तुलना में 80% 14C की मात्रा है। नमूने की आयु का परिकलन कीजिए।
(ब) हाड्रोकार्बन का विघटन निम्नांकित समीकरण के अनुसार होता है सक्रियण ऊर्जा (Ea) की गणना कीजिए।
K= (4.5 × 1011S-1)e-28000 K/T. (1 + 2 = 3)
अथवा
(अ) प्रथम कोटि की अभिक्रिया की परिभाषा दीजिए। एक उदाहरण देकर समझाओ।
(ब) किसी पदार्थ A की सान्द्रता दोगुनी होने पर इसके वियोजन की दर चार गुना हो जाती है। इस अभिक्रिया की कोटि क्या है? (2 + 1 = 3)

प्रश्न 17.
(अ) ऐरिल हैलाइड नाभिकरागी प्रतिस्थापन के प्रति कम क्रियाशील होती है। क्यों?
(ब) ऐथिल क्लोराइड KCN से क्रिया करके मुख्य उत्पाद ऐथिल सायनाइड बनाता है। जबकि AgCN से क्रिया करने पर ऐथिल आयसोसायनाइड बनाता है। समझाइए? (2 + 1 = 3)
अथवा
(अ) कार्बन टेट्राक्लोराइड के चार उपयोग लिखिए।
(ब) ऐनिलीन से ब्रोमोबेन्जीन कैसे प्राप्त करोगे? (2 + 1 = 3).

प्रश्न 18.
(अ) ऐनिलीन की बेन्जोइल क्लोराइड के साथ रासायनिक अभिक्रिया द्वारा उत्पन्न उत्पादों के नाम लिखिए।
(ब) अणुसूत्र C3H9N से प्राप्त विभिन्न सामावयवों की संरचना लिखिए। उन समावयवों के IUPAC नाम लिखिए जो नाइट्रस अम्ल के साथ नाइट्रोजन गैस मुक्त करते हैं। (2 + 1 = 3)
अथवा
(अ) निम्नलिखित परिवर्तन कीजिए
(i) 3-मेथिल ऐनिलीन से 3-नाइट्रोटॉलुइन .
(ii) ऐनिलीन से 1,3,5-ट्राइब्रोमोबेन्जीन।
(ब) कारण बताओ
(i) एथिल ऐमीन जल में विलेय है जबकि एनिलीन नहीं।
(ii) ऐनिलीन फ्रीडल-क्राफ्ट्स अभिक्रिया प्रदर्शित नहीं करती। (1½ + 1½ = 3)

खण्ड – (द)
निबन्धात्मक प्रश्न

प्रश्न 19.
(अ) [Pt(NH3) (Br) (Cl) (Py)] के सभी ज्यामितीय समावयव लिखिए। इनमें से कितने ध्रुवण समावयवता दर्शाएँगे।
(ब) जलीय कॉपर सल्फेट विलयन (नीले रंग का) जलीय पोटैशियम फ्लुओराइड के साथ हरा रंग दर्शाता है। क्यों?
(स) [FeF6]3- में आबन्ध की प्रकृति की विवेचना संयोजकता आबन्ध सिद्धान्त के आधार पर कीजिए। (1 + 1 + 2 = 4)
अथवा
(अ) निम्नलिखित के सभी समावयवों (ज्यामितीय व ध्रुवण) की संरचनाएँ बनाइए
(i) [CoCl2(en)2]+
(ii) [CO(NH3Cl(en)2]2+
(ब) दुर्बल क्षेत्र लिगैण्ड तथा प्रबल क्षेत्र लिगैण्ड में अन्तर स्पष्ट कीजिए।
(स) स्पेक्ट्रमी रासायनिक श्रेणी को परिभाषित कीजिए। (2 + 1 + 1 = 4)

RBSE Class 12 E-Chemistry Self Evaluation Test Papers in Hindi

प्रश्न 20.
(अ) विकार्बोक्सिलीकरण की अपने शब्दों में टिप्पणी कीजिए।
(ब) प्रोपेनैल एवं ब्यूटेनैल के ऐल्डोल संघनन से बनने वाले चार सम्भावित उत्पादों के नाम तथा संरचना सूत्र दीजिए। प्रत्येक में बताइए कि कौन-सा ऐल्डिहाइड नाभिकरागी और कौन-सा इलेक्ट्रॉनरागी होगा?
(स) प्रोपेनैल तथा प्रोपेनोन में विभेद करने के लिए सरल रासायनिक परीक्षण-दीजिए। (1 + 2 + 1 = 4)
अथवा
(अ) बेन्जीन से निम्नलिखित यौगिकों का विरचन आप किस प्रकार करेंगे?
(i) मेथिल बेन्जोएट
(ii) फेनिल ऐसीटिक अम्ल
(ब) निम्न अभिक्रियाओं को पूरा कीजिए
RBSE Class 12 E-Chemistry Self Evaluation Test Paper 1 in Hindi 3
(स) सक्सीनिक अम्ल का IUPAC नाम लिखिए। (1½ + 1½ + 1 = 4)

RBSE Class 12 E-Chemistry Self Evaluation Test Paper 2 in Hindi

खण्ड – (अ)
वस्तुनिष्ठ प्रश्न

प्रश्न 1.
निम्नलिखित प्रश्नों के उत्तर का सही विकल्प चयन कर उत्तर पुस्तिका में लिखें
(i) किस प्रकार के ठोस विद्युत् चालक, आघातवर्धनीय और तन्य होते हैं? (1)
(अ) आण्विक
(ब) आयनिक
(स) धात्विक
(द) सहसंयोजक

(ii) एलिंघम आरेख को ध्यान में रखते हुए निम्नलिखित में से कौन-सी धातु का उपयोग एलुमिना के अपचयन में किया जाता है? (1)
(अ) Mg
(ब) Zn
(स) Fe
(द) Cu

(iii) [Co(NH.) CI] में Co की ऑक्सीकरण अवस्था है (1)
(अ) +1
(ब) +2
(स) +3
(द) +4

(iv) यौगिक A की Na से अभिक्रिया करवाने पर वह B देता है तथा PCl, के साथ अभिक्रिया करवाने पर वह C देता है। B एवं C दोनों की साथ में अभिक्रिया करवाने पर डाइएथिल ईथर प्राप्त होता है। A, B तथा C क्रम में हैं (1)
(अ) C2H5Cl,C2H6C2H5OH
(ब) C2H5OH,C2H5Cl,C2H5ONa
(स) C2H5OH.C2H6C2H5Cl
(द) C2H5OH,C2H5ONa,C2H5Cl

(v) एक यौगिक C7H8, निम्नलिखित अभिक्रियाओं से गुजरता है :
RBSE Class 12 E-Chemistry Self Evaluation Test Paper 2 in Hindi 1
उत्पाद ‘C’ है- (1)
(अ) 3-ब्रोमो-2, 4, 6-ट्राइक्लोरोटॉलुईन
(ब) o-ब्रोमोटॉलुईन
(स) m-ब्रोमोटॉलुईन
(द) p-ब्रोमोटॉलुईन

(vi) CH3OH तथा C2H5OH को हम विभेदित कर सकते हैं (1)
(अ) HCl की क्रिया द्वारा
(ब) I2 + Na2CO3, की क्रिया द्वारा
(स) NH3, की क्रिया द्वारा
(द) जल में विलेयता द्वारा

(vii) निम्न में से कौन-सा कथन सही नहीं है? (1)
(अ) इंसुलिन मानव शरीर रक्त में शर्करा के स्तर को बनाए रखता है।
(ब) अल्बुमीन अण्डे की सफेदी में एक खाद्य संग्रह है।
(स) रक्त प्रोटीन थ्रोम्बिन एवं फिब्रिनोजन का योगदान रक्त का थक्का बनाने में है। (1)
(द) विकृतीकरण प्रोटीन को अधिक सक्रिय करते हैं।

(viii) आण्विक आनुवंशिकता का केन्द्रीय सिद्धांत कहता है कि आनुवंशिक सूचना का प्रवाह होता है (1)
(अ) DNA → RNA → प्रोटीन
(ब) DNA → RNA → कार्बोहाइड्रेट
(स) ऐमीनो अम्ल → प्रोटीन → DNA
(द) DNA → कार्बोहाइड्रेट → प्रोटीन

(ix) RNA एवं DNA के लिए सही कथन क्रमश: है- (1)
(अ) RNA में शर्करा घटक अरेबिनोस है और DNA में शर्करा घटक राइबोस है।
(ब) RNA में शर्करा घटक 2-डिऑक्सीराइबोस और DNA में शर्करा घटक अरेबिनोस है।
(स) RNA में शर्करा घटक अरेबिनोस है और DNA में शर्करा घटक 2-डिऑक्सीराइबोस है।
(द) RNA में शर्करा घटक राइबोस है और DNA में शर्करा घटक 2 डिऑक्सीराइबोस है।

RBSE Class 12 E-Chemistry Self Evaluation Test Papers in Hindi

प्रश्न 2.
रिक्त स्थान की पूर्ति कीजिए
(i) CaO ____________ गालक है। (1)

(ii) हरी लकड़ियों के डण्डों से __________ का शोधन किया जाता है। (1)

(iii) ऐक्टिनियम ____________ ब्लॉक तत्व है। (1)

(iv) टेट्राएथिल लैड ____________ यौगिक है। (1)

प्रश्न 3.
अतिलघूत्तरात्मक प्रश्न
(i) काँच और प्लास्टिक किस प्रकार के ठोस के उदाहरण हैं? (1)

(ii) विलेय-विलायक आकर्षण के आधार पर निम्नलिखित को n-ऑक्टेन की विलेयता के बढ़ते क्रम में व्यवस्थित कीजिए (1)
KCl, CH3OH, CH3CN, C6H12

(iii) बेन्जोइक अम्ल का मेथेनॉल में 0.15 m विलयन बनाने के लिए आवश्यक मात्रा की गणना कीजिए। (1)

(iv) ऐल्युमिनियम के निष्कर्षण में निक्षालन का क्या महत्व है? (1)

(v) Cr2+ अपचायक है जबकि Mn2 ऑक्सीकारक जबकि दोनों का d विन्यास है, क्यों? (1)

(vi) 1-मेथिलसाइक्लोहेक्सेनॉल के अम्ल उत्प्रेरित निर्जलन के मुख्य उत्पादों की प्रागुक्ति कीजिए। (1)

(vi) एनिलीन का pK, मेथिल एमीन की तुलना में अधिक होता है। क्यों? (1)

(viii)
RBSE Class 12 E-Chemistry Self Evaluation Test Paper 2 in Hindi 2
उपरोक्त अभिक्रिया में A, B, C की संरचना दीजिए। 273K. (1)

खण्ड – (ब)
लघूत्तरात्मक प्रश्न

प्रश्न 4.
फैरी-चुम्बकत्व तथा प्रति लौहचुम्बकत्व पर टिप्पणी कीजिए। (1½)

प्रश्न 5.
धात्विक और आयनिक क्रिस्टलों में समानता एवं विभेद का आधार समझाइए। (1½)

प्रश्न 6.
36 g जल और 46 g ऐथिल-ऐल्कोहॉल मिश्रण में दोनों का मोल प्रभाज ज्ञात कीजिए। (1½)

प्रश्न 7.
एक विलयन में 40 g NaOH को 500 ml जल में घोला गया है। इसकी मोलरता तथा नॉर्मलता की गणना कीजिए। (1½)

प्रश्न 8.
(अ) एक रासायनिक अभिक्रिया का वेग नियतांक 1.72 × 10-4 s-1 है। अभिक्रिया की कोटि ज्ञात कीजिए।
(ब) शून्य कोटि और प्रथम कोटि अभिक्रियाओं का एक-एक उदाहरण दें। (¾ + ¾ = 1½)

प्रश्न 9.
एक ऊष्माक्षेपी अभिक्रिया के लिये स्थितिज ऊर्जा एवं अभिक्रिया निर्देशांक के मध्य आरेख बनाइये जिसमें क्रियाकारक व उत्पाद के लिये सक्रियण ऊर्जा, सक्रियत संकर व स्थितिज ऊर्जा को दर्शाया गया हो? (1½)

प्रश्न 10.
संक्रमण तत्वों की प्रथम श्रेणी में आयनन एन्थैल्पी (प्रथम और द्वितीय) में अनियमित परिवर्तन को आप कैसे समझायेंगे? (1½)

प्रश्न 11.
पौटेशियम डाइक्रोमेट की ऑक्सीकरण क्रिया का उल्लेख कीजिए तथा निम्नलिखित के साथ आयनिक समीकरण लिखिए. (¾ + ¾ = 1½)
(अ.) आयोडाइड विलयन
(ब) आयरन (II) विलयन

प्रश्न 12.
(अ) ऐसिड क्लोराइडों को संगत ऐल्डिहाइडों में परिवर्तन के लिए अभिक्रिया का नाम तथा प्रयुक्त अभिकर्मक लिखिए।
(ब) ऐल्डिहाइडों व कीटोनों के हाइड्रेजोन उच्च अम्लीय माध्यम में नहीं बनते, क्यों? (¾ + ¾ = 1½)

RBSE Class 12 E-Chemistry Self Evaluation Test Papers in Hindi

प्रश्न 13.
(अ) बेन्जीन और ऐनिलीन से फोनॉल विरचन के समीकरण दीजिए। (ब) निर्जल कैल्शियम ऐसीटेट को गर्म करने पर क्या उत्पाद बनता है? (¾ + ¾ = 1½)

प्रश्न 14.
क्लीमेन्सन अपचयन में काम आने वाले अभिकर्मक का नाम लिखिए। (1½)

प्रश्न 15.
राइमर टीमैन अभिक्रिया को समझाओ। (1½)

खण्ड – (स)
दीर्घ उत्तरीय प्रश्न

प्रश्न 16.
(अ) प्रथम कोटि की अभिक्रिया के लिए वेग स्थिरांक k का मान = 5.5 × 10-4 S-1पाया गया। इस अभिक्रिया के अर्द्धआयु की गणना कीजिए।
(ब) अभिक्रिया की तात्क्षणिक दर को परिभाषित कीजिए। (2 + 1 = 3)
अथवा
(अ) एक पदार्थ A की सान्द्रता दोगुनी होने पर इसके वियोंजन की दर चार गुनी हो जाती है। इस अभिति। की कोटि क्या है?
(ब) वेग नियम और द्रव्य अनुपाती क्रिया के नियम में क्या अन्तर है?

प्रश्न 17.
(अ) ऐरिल हैलाइड नाभिक स्नेही प्रतिस्थापन अभिक्रियाओं के प्रति कम क्रियाशील क्यों होते हैं ? समझाइये।
(ब) निम्नलिखित ऐल्किल हैलाइडों को SN2 अभिक्रिया के प्रति उनकी अभिक्रियाशीलता के बढ़ते क्रम में व्यवस्थित कीजिए-..
CH3CH2Cl,(CH3)2, CHCl,(CH3),CCl
(स) CH3Cl का कक्षक आरेख बनाइए। (1 + 1 = 3)
अथवा
(अ) वटुंज-फिटिंग अभिक्रिया का रासायनिक समीकरण लिखिए।
(ब) ऐल्किल क्लोराइड जलीय KOH से अभिक्रिया करके ऐल्कोहॉल बनाता है जबकि ऐल्कोहॉलिक KOH की उपस्थिति में ऐल्कीन मुख्य उत्पाद के रूप में प्राप्त होती है। समझाइए।
(स) निम्नलिखित हैलोजन व्युत्पन्नों को नाभिक स्नेही प्रतिस्थापन अभिक्रियाशीलता के प्रति अभिक्रियाशीलता के क्रम में व्यवस्थित कीजिए (1 + 1 + 1 = 3)
RBSE Class 12 E-Chemistry Self Evaluation Test Paper 2 in Hindi 3

RBSE Class 12 E-Chemistry Self Evaluation Test Papers in Hindi

प्रश्न 18.
(अ) निम्नलिखित को उनके बढ़ते हुए क्षारकीय प्रबलता के क्रम में लिखिए
(i) C2H5NH2(C2H5)2NH,(C2H5)3N,C6H5NH2
(ii) CH3NH2,(CH3)2NH,(CH3)3N,C6H5NH2,C6H5CH2NH2
(ब) निम्नलिखित अभिक्रियाओं के लिए रासायनिक समीकरण लिखिए
(i) एथेनॉलिक NH3 की C2H5Cl के साथ अभिक्रिया।
(ii) बेन्जिल क्लोराइड का अमोनी अपघटन तथा प्राप्त ऐमीन की दो मोल CH3Cl से अभिक्रिया। (1½ + 1½ = 3)
अथवा
(अ) निम्नलिखित युगलों के यौगिकों में विभेद करने के लिए रासायनिक परीक्षण दीजिए-
(i) मेथिल ऐमीन एवं डाइमेथिल ऐमीन
(ii) द्वितीयक एवं तृतीयक ऐमीम्

(ब) निम्नलिखित परिवर्तनों के लिए रासायनिक समीकरण लिखिए
(i) CH3 – CH2 – Cl से CH3 – CH2 – CH2 – NH2 में
(ii) C6H5 – CH2 – Cl से C6H5 – CH2 – CH2 – NH2 में (1½ + 1½ = 3)

खण्ड – (द)
निबन्धात्मक प्रश्न

प्रश्न 19.
(अ) sp3, dsp2 कक्षक प्रयुक्त करने वाले संकुलों की ज्यामितीय आकृति क्या होगी? प्रत्येक का एक उदाहरण दीजिए।
(ब) द्विक लवण एवं संकुल में अन्तर समझाते हुए प्रत्येक का एक-एक उदाहरण दीजिये।
(स) उपसहसंयोजन यौगिकों की संरचना समावयवता की व्याख्या उचित उदाहरण के साथ कीजिए। (1 + 1 + 2 = 4)
अथवा
(अ) IUPAC नियमों का प्रयोग करते हुए निम्न के नाम लिखिए.
(i) K3[Co(C2O4)3]
(ii) [Ni(CO)4]
(iii) [Zn(NH3)3]Cl2
(iv)K4[Fe(CN)6]
(ब) क्रिस्टल क्षेत्र सिद्धान्त को समझाइए।.अष्टफलकीय व चतुष्फलकीय संकुल यौगिकों में d-कक्षकों का विपाटन स्पष्ट कीजिए। (2 + 2 = 4)

प्रश्न 20.
(अ) कैनिजारो अभिक्रिया की रासायनिक समीकरण लिखिए। (2 + 2 = 4)
(ब) मेथिल पेन्ट-3-ईन-2-ओन की संरचना दीजिए।
(स) ऐसीटेल्डिहाइड की अभिक्रिया टॉलेन अभिकर्मक से कराने पर प्राप्त उत्पाद क्या होगा? (2 + 1 + 1 = 4)
अथवा
(अ) निम्नलिखित हैलो अम्लों को उनकी अम्लीयता के बढ़ते क्रम में व्यवस्थित कीजिए-
Cl3CCOOH, Cl2CHOOH, ClCH2COOH
(ब) निम्नलिखित हैलो अम्लों की उनकी बढ़ती अम्लता के क्रम में व्यवस्थित कीजिए
FCH2COOH, ClCH2COOH, BrCH2COOH .
(स) निम्नलिखित यौगिक का आई. यू.पी.ए.सी. नाम लिखिए (1½ + 1½ + 1 = 4)
RBSE Class 12 E-Chemistry Self Evaluation Test Paper 2 in Hindi 4

RBSE Class 12 E-Chemistry Self Evaluation Test Papers in Hindi

RBSE Class 12 E-Chemistry Self Evaluation Test Paper 3 in Hindi

खण्ड – (अ)
वस्तुनिष्ठ प्रश्न

प्रश्न 1.
निम्नलिखित प्रश्नों के उत्तर का सही विकल्प चयन कर उत्तर पुस्तिका में लिखें.
(i) ठोस A एक अति कठोर ठोस तथा गलित अवस्था में विद्युतरोधी है और बहुत उच्च ताप पर पिघलता है। यह किस प्रकार का ठोस है? (1)
(अ) आण्विक
(ब) आयनिक
(स) धात्विक
(द) सहसंयोजक

(ii) निम्न में से कौन मैलेकाइट है? (1)
(अ) CuCO3, Cu(OH)2,
(ब) CuFeS2
(स) Cu(OH)2
(द) Fe2O4

(iii) [Cr(H2O)5Cl]Cl2, आयन में Cr की संयोजकता होती है. (1)
(अ) 3
(ब) 1
(स) 6
(द) 5

(iv) काइरल केन्द्र पर SN1 अभिक्रिया में होता है (1)
(अ) 100% रेसिमीकरण
(ब) धारण में ज्यादा प्रतिलोमन के द्वारा आंशिक रेसिमीकरण
(स) 100% धारण
(द) 100% प्रतिलोमन

(v) CH3CHOHCOOH की दो संभावित त्रिविम संरचनायें जो कि धुवण घूर्णक हैं, कहलाती हैं- (1)
(अ) डायास्टिरियोमर
(ब) एट्रोपआइसोमर
(स) प्रतिबिम्ब रूप
(द) मेसोमर

(vi)
RBSE Class 12 E-Chemistry Self Evaluation Test Paper 3 in Hindi 1
का सही आई.यू.पी.ए.सी. नाम है (1)
(अ) tert-ब्यूटिल ऐल्कोहॉल
(ब) 2, 2-डाइमेथिलप्रोपेनॉल
(स) 2-मेथिलब्यूटेन-2-ऑल
(द) 3-मैथिलब्यूटेन-3-ऑल

(vii) प्रोटीन अणु में विभिन्न ऐमीनो अम्ल एक दूसरे से जुड़े रहते हैं (1)
(अ) पेप्टाइड आबंध के द्वारा
(ब) दाता आबंध के द्वारा
(स) a-ग्लाइकोसिडिक आबंध के द्वारा
(द) B-ग्लाइकोसिडिक आबंध के द्वारा

(viii) निम्न में से कौन-सी एक गैर-अपचायक शुगर है? (1)
(अ) ग्लूकोस
(ब) सुक्रोस
(स) माल्टोस
(द) लेक्टोस

RBSE Class 12 E-Chemistry Self Evaluation Test Papers in Hindi

(ix) DNA में नाइट्रोजनी क्षारों के मध्य सहलग्नता है – (1)
(अ) फॉस्फेट सहलग्नता
(ब) हाइड्रोजन आबन्ध
(स) ग्लाइकोसाइडिक सहलग्नता
(द) पेप्टाइड संहलग्नता

प्रश्न 2.
रिक्त स्थान की पूर्ति कीजिए
(i) प्रगलन के लिए ________ भट्टी का उपयोग किया जाता है। (1)

(ii) निकिल के परिष्करण की विधि ________ विधि है। (1)

(iii) परमाणु क्रमांक वृद्धि पर लैंथेनाइडों की त्रिज्या का आकार क्रमशः ________ होता जाता है। (1)

(iv) हीमोग्लोबिन आयरन का __________ यौगिक है। (1)

प्रश्न 3.
अतिलघूत्तरात्मक प्रश्न
(i) एक घनीय निविड संकुलित संरचना की एकक कोष्ठिका में चतुष्फलकीय रिक्तियों की संख्या बताइए। (1)

(ii) ऐल्काहॉल एवं जल के एक विलयन में आण्विक अन्योन्य की क्या भूमिका है? (1)

(iii) 750 मिमी. दाब पर जल का क्वथनांक 99.63°C है। 500 ग्राम जल में कितना सुक्रोस मिलाया जाता है तो इसका 100°C पर क्वथनांक हो जाए? (1)

(iv) निकिल शोधन की विधि समझाइए। (1)

(v) आप किस आधार पर यह कह सकते हैं कि स्कैन्डियम (Z = 21) एक संक्रमण तत्व है परन्तु जिंक (Z = 30) नहीं ? (1)

(vi) क्यूमीन से फीनॉल बनाने की अभिक्रिया का समीकरण दीजिए। (1)

(vii) प्राथमिक ऐमीन के संश्लेषण में गैब्रिएल थैलिमाइड संश्लेषण को प्राथमिकता दी जाती है। क्यों? (1)

(viii)
RBSE Class 12 E-Chemistry Self Evaluation Test Paper 3 in Hindi 2
उपरोक्त अभिक्रिया में A, B, C की संरचना दीजिए। (1)

खण्ड – (ब)
लघूत्तरात्मक प्रश्न

प्रश्न 4.
शॉटकी दोष तथा अन्तराकाशी दोष पर टिप्पणी कीजिए। (1½)

प्रश्न 5.
F-केन्द्र और आयनिक ठोस पर टिप्पणी कीजिए। (1½)

प्रश्न 6.
यदि 22 g बेन्जीन में 122 g कार्बन टेट्रॉक्लोराइड घुली हो तो बेन्जीन एवं कार्बन टेट्राक्लोराइड के द्रव्यमान प्रतिशत की गणना कीजिए। (1½)

प्रश्न 7.
एक अवाष्पशील विलेय को किसी विलायक में मिलाने से उसका वाष्प दाब कम क्यों हो जाता है? (1½)

प्रश्न 8.
अणु X का Y में रूपान्तरण द्वितीय कोटि की बलगतिकी के अनुरूप होता है। यदि X की सान्द्रता तीन गुनी कर दी जाये तो Y के निर्माण होने के वेग पर क्या प्रभाव पड़ेगा? (1½)

प्रश्न 9.
एक प्रथम कोटि की अभिक्रिया में 20% वियोजन होने में 40 मिनट लगते हैं। अर्द्धआयु की गणना कीजिए। (1½)
(log1010 = 1, log102 = 0.3010)

RBSE Class 12 E-Chemistry Self Evaluation Test Papers in Hindi

प्रश्न 10.
कोई धातु अपनी उच्चतम ऑक्सीकरण अवस्था केवल ऑक्साइड अथवा फ्लुओराइड में ही क्यों प्रदर्शित करती है? (1½)

प्रश्न 11.
आप निम्नलिखित को किस प्रकार से स्पष्ट करेंगे।
(अ) स्पीशीज में से Cr2+ प्रबल अपचायक है, जबकि मैंगनीज (III) प्रबल ऑक्सीकारक है।
(ब) जलीय विलयन में Co(II) स्थायी है, परन्तु संकुलनकारी अभिकर्मकों की उपस्थिति में यह सरलतापूर्वक ऑक्सीकृत हो जाती है। (¾ + ¾ = 1½)

प्रश्न 12.
एक कार्बनिक यौगिक जिसका अणुसूत्र C3H6O है, 2,4-डाइनाइट्रोफेनिल हाइड्रॉजीन के साथ नारंगी लाल अवक्षेप देता है किन्तु टॉलेन अभिकर्मक को अपचयित नहीं करता है। यौगिक का IUPAC नाम व संरचना सूत्र लिखिये। (1½)

प्रश्न 13.
क्या होता जब फीनॉल CS2 में घुली हिमशीतित ब्रोमीन से अभिक्रिया करता है? समीकरण दें। (1½)

प्रश्न 14.
निम्नलिखित यौगिकों की संरचना व IUPAC नाम लिखिए. (1½)
(i) क्रोटोनैल्डिहाइड
(ii) सैलिसिलऐल्डिहाइड

प्रश्न 15.
निम्न अभिक्रियाओं को पूरा कीजिए – (¾ + ¾ = 1½)
RBSE Class 12 E-Chemistry Self Evaluation Test Paper 3 in Hindi 3

खण्ड – (स)
दीर्घ उत्तरीय प्रश्न

प्रश्न 16.
(अ) रासायनिक अभिक्रिया के संघट्ट सिद्धान्त को समझाओ।
(ब) सक्रियण ऊर्जा पर उत्प्रेरक के प्रभाव को दर्शाने वाला आरेख बनाइए। (2 + 1 = 3)
अथवा
(अ) अभिक्रिया का वेग क्या होता है? इसको प्रभावित करने वाले कारकों को समझाओ।
(ब) दर्शाइए कि प्रथम कोटि की अभिक्रिया का अर्द्धआयुकाल अभि कारकों के प्रारम्भिक सान्द्रण पर निर्भर नहीं करता है। (2 + 1 = 3)

प्रश्न 17.
(अ) क्या होता है जब
(i) ऐथिल ऐल्कोहॉल को आयोडीन एवं सोडियम हाइड्रॉक्साइड के साथ गर्म करते हैं?
(ii) ट्राइक्लोरो एथेनॉल जलीय सोडियम हाइड्रॉक्साइड के साथ क्रिया करता है?
(iii) सिल्वर आइसोब्यूटाइरेट का आसवन Br2 के साथ CCl4 की उपस्थिति में करते हैं?
(iv) एथिल क्लोराइड की क्रिया मरक्यूरस फ्लुओराइड के साथ होती है?
(ब) ट्राइक्लोरोमेथेन को गहरी रंगीन बोतलों में संग्रहीत करते हैं। तर्क दीजिए। (2 + 1 = 3)
अथवा
(अ) मुख्य उत्पाद की प्रागुक्ति कीजिए जब 2-ब्रोमोपेन्टेन, ऐल्कोहॉली KOH के साथ अभिक्रिया करता है।
(ब) आप किस प्रकार बनायेंगे?
(i) टॉलुईन से बेन्जिल ऐल्कोहॉल
(ii) ब्रोमोबेन्जीन से m-नाइट्रोबेन्जोइक अम्ल (2 + 1 = 3)

प्रश्न 18.
(अ) निम्न अभिक्रियाओं को पूर्ण कर उनके नाम लिखिए- .
(i) RNH2 + CHCl3 + 3KOH→
(ii) RCONH2 + Br2 + 4NaOH →
(ब) निम्नलिखित अभिक्रियाओं को पूर्ण कीजिए
(i) C6H5NH2 + H2SO (सान्द्र) →
(ii) C6H5N2Cl + C2H5OH →
(iii) C6H5NH2 + Br2(aq) →
(iv) C6H5NH2 + (CH3CO)2O) (1 + 2 = 3)
अथवा
(अ) यद्यपि ऐमीनो समूह इलेक्ट्रॉनरागी प्रतिस्थापन अभिक्रियाओं में ऑर्थो एवं पैरा-निर्देशक होता है, फिर भी ऐनिलीन नाइट्रीकरण द्वारा यथेष्ट मात्रा में मेटा-नाइट्रोऐनिलीन देती है। क्यों?
(ब) निम्नलिखित अभिक्रियाओं में A, B तथा C की संरचना दीजिए – (1 + 2 = 3)
RBSE Class 12 E-Chemistry Self Evaluation Test Paper 3 in Hindi 4

खण्ड – (द)
निबन्धात्मक प्रश्न

प्रश्न 19.
(अ) K3[FeC2O4)3] संकुल का IUPAC नाम लिखिए।
(ब) संयोजकता बन्ध सिद्धान्त के आधार पर, [NiCl4]2- संकुल आयन की ज्यामिति एवं चुम्बकीय प्रकृति लिखिए। … (स) आवेश के आधार पर लिगैण्डों को किस प्रकार वर्गीकृत किया जा सकता है? उदाहरण देते हुए समझाइए। (1 + 2 + 1 = 4)
अथवा
(अ) यद्यपि [NiCl4]2- और [Ni(CO)4] दोनों में sp3 संकरण होता है फिर भी [NiCl4]2- अनुचुम्बकीय है और [Ni(CO)4] प्रतिचुम्बकीय है। कारण दीजिए। (Nj का परमाणु क्रमांक = 28)
(ब) क्रिस्टल क्षेत्र सिद्धान्त के आधार पर क का इलेक्ट्रॉनिक विन्यास लिखिए जबकि (i) ∆0 < P और, (ii) ∆0 > P
(स) निम्न संकर यौगिकों के सन्दर्भ में ज्यामितीय समावयवता को समझाइए() [PICl2(NH3)2],
(ii) [Co(NH3)2Cl2]. (1 + 2 + 1 = 4)

RBSE Class 12 E-Chemistry Self Evaluation Test Papers in Hindi

प्रश्न 20.
(अ) टॉलूईन के बेन्जोइक अम्ल में रूपान्तरण कीजिए।
(ब) आप एथेनॉल से एथिलीन कैसे प्राप्त करेंगे?
(स) ऐलिफैटिक ऐल्डिहाइड स्थान समावयवता प्रदर्शित नहीं करते, क्यों? (1 + 2 + 1 = 4)
अथवा
(अ) एक ऐल्डिहाइड का नाम लिखिए जो फेहलिंग विलयन परीक्षण नहीं देता है।
(ब) क्या होता है जब फॉर्मेल्डिहाइड की अभिक्रिया साद्र NaOH विलयन से कराते हैं?
(स) निम्नलिखित को HCN के प्रति बढ़ती क्रियाशीलता के क्रम में लिखिए – (1 + 1 + 2 = 4)
CH3CHO,CH3COCH,HCHO,C2H5COCH,

RBSE Class 12 E-Chemistry Self Evaluation Test Paper 4 in Hindi

खण्ड – (अ)
वस्तुनिष्ठ प्रश्न

प्रश्न 1.
निम्नलिखित प्रश्नों के उत्तर का सही विकल्प चयन कर उत्तर पुस्तिका में लिखें
(i) एक विशेष ठोस अति कठोर है तथा इसका गलनांक अति उच्च है। ठोस अवस्था में यह अचालक है तथा प्रगलन पर यह विद्युत चालक हो जाता है। ठोस है (1)
(अ) धात्विक
(ब) आण्विक
(स) नेटवर्क
(द) आयनिक

(ii) सोने एवं चाँदी के निष्कर्षण में CN– आयन से निक्षालन होता है। चाँदी को बाद में पुनः प्राप्त किसके द्वारा किया जाता है (1)
(अ) द्रवगलन परिष्करण
(ब) आसवन
(स) मंडल परिष्करण
(द) Zn से विस्तापन

(iii) [Co(en)2Cl2]Cl में Co की समन्वय संख्या है। (1)
(अ) 3
(ब) 4
(स) 5
(द) 6

(iv) एक ऐल्कीन HCl से अभिक्रिया करके मारकोनीकॉफ नियम के अनुसार उत्पाद 1-क्लोरो-1-मेथिल साइक्लोहेक्सेन देता है। सम्भावित ऐल्कीन है (1)
(अ)
RBSE Class 12 E-Chemistry Self Evaluation Test Paper 4 in Hindi 1
(ब)
RBSE Class 12 E-Chemistry Self Evaluation Test Paper 4 in Hindi 2
(स) (अ) और (ब)
(द)
RBSE Class 12 E-Chemistry Self Evaluation Test Paper 4 in Hindi 3

(v) किसी कार्बनिक यौगिक में आइसोब्यूटाइल समूह की संरचना है (1)
(अ)
RBSE Class 12 E-Chemistry Self Evaluation Test Paper 4 in Hindi 4
(ब) CH3 – CH2 – CH2 – CH2 –
(स)
RBSE Class 12 E-Chemistry Self Evaluation Test Paper 4 in Hindi 5
(द)
RBSE Class 12 E-Chemistry Self Evaluation Test Paper 4 in Hindi 6

(vi) ऐल्केनॉल समजात श्रेणी को प्रदर्शित करने वाला सामान्य सूत्र है- (1)
(अ) CnH2n + 2O.
(ब) CnH2nO2
(स) CnH2nO
(द) CnH2n + 1O

(vii) निम्न में अनावश्यक ऐमीनो अम्ल है (1)
(अ) लाइसीन
(ब) वैलीन
(स) ल्यूसनी
(द) एलानिन

(viii) ऐमिलोस एवं ऐमिलोपेक्टिन में भिन्नता होती है- (1)
(अ) ऐमिलोपेक्टिन में 1 → 4 α-बंधन तथा 1 → 6 β-बंधन है
(ब) ऐमिलोस में 1 → 4 α-बंधन तथा 1 → 6 β-बंधन है ।
(स) ऐमिलोपेक्टिन में 1 → 4 α-बंधन तथा 1 → 6 β-बंधन है
(द) ऐमिलोस ग्लूकोस एवं गैलेक्टोस से बना है

(ix) निम्नलिखित में से कौन-सा यौगिक ग्विटर आयन बना सकता है? (1)
(अ) बेन्जोइक अम्ल
(ब) ऐसीटेनिलाइट
(स) ऐनिलीन
(द) ग्लाइसीन

प्रश्न 2.
रिक्त स्थान की पूर्ति कीजिए
(i) अधिकांश सल्फाइड अयस्कों का सान्द्रण …………… विधि द्वारा किया जाता है। (1)

(ii) फफोलेदार कॉपर में फफोले ……………… गैस के द्वारा पड़ते हैं। (1)

(iii) K2Cr2O2 एक प्रबल ………………… है। (1)

(iv) K4[FeF6] ………………….. चुम्बकीय गुण को दर्शाता है। (1)

RBSE Class 12 E-Chemistry Self Evaluation Test Papers in Hindi

प्रश्न 3.
अतिलघूत्तरात्मक प्रश्न
(i) त्रिनताक्ष क्रिस्टल के अक्षीय दूरियों एवं अक्षीय कोणों का मान लिखिए। (1)

(ii) मोलल उन्नयन स्थिरांक (Kb) की गणना के लिए सूत्र लिखिए और प्रयुक्त संकेतों का अर्थ बताओ। (1)

(iii) अगर Cus का विलेयता गुणनफल 6 × 10-16 है तो जलीय विलयन में उसकी अधिकतम मोलरता ज्ञात कीजिए। (1)

(iv) फेन प्लवन विधि में अवनमक की क्या भूमिका है? (1)

(v) Cr2+ एवं. Fe2+ में से कौन प्रबल अपचायक है और क्यों? (1)

(vi) समझाइए कि प्रोपेनॉल का क्वथनांक, हाइड्रोकार्बन ब्यूटेन से अधिक क्यों होता है? (1)

(vii) ऐरोमैटिक ऐमीनों के हाइऐजोनियम लवण ऐलिफैटिक ऐमीनों से प्राप्त लवण से अधिक होते हैं। क्यों? (1)

(viii) निम्न अभिक्रिया को पूरा कीजिए- (1)
C6H5NH2+ (CH3CO)2O →

खण्ड – (ब)
लघूत्तरात्मक प्रश्न

प्रश्न 4.
लौहचुम्बकत्व तथा अनुचुम्बकत्व पर टिप्पणी कीजिए। (1½)

प्रश्न 5.
यदि NaCl को SrCl2 के 10-3 मोल % से डोपित किया जाए तो धनायनों की रिक्तियों का सान्द्रण क्या होगा? (1½)

प्रश्न 6.
पानी में डालने पर किशमिश फूल जाती है जबकि चीनी के सान्द्र विलयन में यह सिकुड़ जाती है। क्यों? (1½)

प्रश्न 7.
परासरण दाब ज्ञात करने का सूत्र स्थापित कीजिए। (जहाँ π = परासरण दाब) (1½)

प्रश्न 8.
प्रथम कोटि की अभिक्रिया का अर्द्ध-आयु काल 10s है। इसके वेग स्थिरांक की गणना कीजिए। (1½)

प्रश्न 9.
अभिक्रिया की आण्विकता को परिभाषित कीजिए। (1½)

प्रश्न 10.
कॉपर के लिए E0(M2+/M) का मान धनात्मक (+ 0.34V) है। इसका सम्भावित कारण क्या है? (1½)

प्रश्न 11.
अन्तराकाशी यौगिक क्या है? इस प्रकार के यौगिक संक्रमण धातुओं के लिए भली प्रकार से ज्ञात क्यों हैं? (1½)

प्रश्न 12.
फॉर्मिक अम्ल के कोई दो अपचायक गुण लिखिए। (1½)

प्रश्न 13.
निम्नलिखित अभिक्रिया की क्रियाविधि लिखिए। (1½)
RBSE Class 12 E-Chemistry Self Evaluation Test Paper 4 in Hindi 7

प्रश्न 14.
निर्जल कैल्सियम ऐसीटेट को गर्म करने पर क्या उत्पाद बनता है रासायनिक समीकरण देकर समझाओ। (1½)

प्रश्न 15.
फीनॉल की अनुनादी संरचनाएँ लिखिए। (1½)

खण्ड – (स)
दीर्घ उत्तरीय प्रश्न

प्रश्न 16.
(अ) उन अभिक्रियाओं की कुल कोटि की गणना कीजिए जिनका वेग व्यंजक वेग = k[A]1/2[B]3/2 है।
(ब) प्रथम कोटि की अभिक्रिया N2O5(g) → 2NO2(g) + \(\frac{1}{2}\)O2(g) में 318 k पर N2O5 की प्रारम्भिक सान्द्रता 1.24 × 10-2mol L-1 थी, जो 60 मिनट के उपरान्त 0.20 × 10-2 mol L-1 रह गई। 318 k पर वेग स्थिरांक की गणना कीजिए। (1 + 2 = 3)
अथवा
(अ) शून्य कोटि अभिक्रिया के लिए अर्द्ध-आयुकाल का सूत्र लिखिए। वेग स्थिरांक किसे कहते हैं?
(ब) अभिक्रिया का औसत वेग ज्ञात करने का सूत्र लिखिए। (2 + 1 = 3)

प्रश्न 17.
(अ) निम्नलिखित प्रत्येक अभिक्रिया के मुख्य मोनोहैलो उत्पाद की संरचना बनाइए (2 + 1 = 3)
RBSE Class 12 E-Chemistry Self Evaluation Test Paper 4 in Hindi 8
(ब) क्या होता है जब (केवल रासायनिक अभिक्रिया का समीकरण दीजिए)
(i) क्लोरोबेन्जीन की क्रिया नाइट्रीकारी मिश्रण से कराई जाती है।
(ii) ऐथिल ब्रोमाइड मैग्नीशियम से क्रिया करता है।
(iii) क्लोरोफॉर्म की प्रकाश की उपस्थिति में 0, से क्रिया होती है।
(iv) ऐरिल हैलाइड सोडियम से क्रिया करता है। (1 + 2 = 3)
अथवा
(अ). निम्नलिखित युगलों में से आप कौन-से ऐल्किाल हैलाइड द्वारा SN2 क्रियाविधि से अधिक तीव्रता से अभिक्रिया करने की अपेक्षा करते हैं? अपने उत्तर को समझाइए।
RBSE Class 12 E-Chemistry Self Evaluation Test Paper 4 in Hindi 9
(ब) ऐल्कोहॉलों से एल्किल क्लोराइड विरचन के लिए थायोनिल क्लोराइड विधि को वरीयता दी जाती है। कारण समझाइए। (2 + 1 = 3)

RBSE Class 12 E-Chemistry Self Evaluation Test Papers in Hindi

प्रश्न 18.
(अ) निम्नलिखित को क्षारकीय प्राबल्य के घटते क्रम में लिखिए
C6H5NH2, C2H5NH2, (C2H5)2NH, NH3
(ब) आप 4-नाइट्रोटॉलुईन को 2-ब्रोमोबेन्जोइक अम्ल में कैसे परिवर्तित करेंगे? (1 + 2 = 3)
अंथवा
(अ) निम्नलिखित की संरचनाएँ एवं आई.यू.पी.ए.सी. नाम लिखिए
(i) ऐमाइड जो हॉफमान ब्रोमैमाइड अभिक्रिया द्वारा प्रोपेनेमीन देता है।
(ii) बेन्जेमाइड के हॉफमान ब्रोमैमाइड निम्नीकरण से प्राप्त ऐमीन।
(ब) सोडियम कार्बोनेट विलयन की उपस्थिति में मेथिल आयोडाइड के आधिक्य द्वारा ऐनिलीन के ऐल्किलन में उत्पन्न होने वाले उत्पादों के लिए अभिक्रिया लिखिए। (½ + 2 + ½ = 3)

खण्ड – (द)
निबन्धात्मक प्रश्न

प्रश्न 19.
(अ) संयोजकता बन्ध सिद्धान्त के आधार पर संकुल (COF6)3- की ऑक्सीकरण अवस्था, संकरण, ज्यामिति एवं चुम्बकीय प्रकृति समझाइये।
(ब) निम्नलिखित संकुलों में केन्द्रीय धातु परमाणु की ऑक्सीकरण अवस्था ज्ञात कीजिए
(i) K3[Fe(C2O4)3]
(ii) [Fe(CN)6]3- (2 + 2 = 4)
अथवा
(अ) निम्न में से धनायनिक, ऋणायनिक तथा उदासीन संकर यौगिकों को छाँटिए-
K2[Hg I4], [CO(NH3)6]Cl3, K4[Fe(CN)6], [Ni(CO)4], [Pt(NH3),Cl2], [Fe(H2O)6]Cl3
(ब)क्रिस्टल क्षेत्र सिद्धान्त के अनुसार बताइए कि [Fe(H2O)6]3+ प्रबल अनुचुम्बकीय संकुल है जबकि [Fe(CN)6]3- दुर्बल अनुचुम्बकीय संकुल है। (1½ + 2½ = 4)

प्रश्न 20.
(अ) निम्नलिखित अभिक्रियाओं के उत्पादों को पहचानिए-
RBSE Class 12 E-Chemistry Self Evaluation Test Paper 4 in Hindi 10
(ब) एथेनैल को निम्नलिखित यौगिकों में कैसे परिवर्तित करेंगे?
(i) ब्यूटेन-1, 3-डाइऑल
(ii) ब्यूट-2-ईनल (2 + 2 = 4)
अथवा
(अ) आक्सेलिक अम्ल का संरचना सूत्र लिखिए।
(ब) निम्नलिखित यौगिकों को उनके क्वथनांकों के बढ़ते क्रम में व्यवस्थित कीजिए
CH3CH2CH3, CH3CH2OH, CH3CHO, CH3OCH3
(स) ऐसीटोन को 2-मेथिल प्रोपेन-2-ऑल में परिवर्तित कैसे करेंगे? (1 + 1 + 2 = 4)

RBSE 12th Chemistry Model Paper Set 9 with Answers in Hindi

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RBSE 12th Chemistry Model Paper Set 9 with Answers in Hindi 26

Students must start practicing the questions from RBSE 12th Chemistry Model Papers Model Paper Set 9 with Answers in Hindi Medium provided here.

RBSE Class 12 Chemistry Model Paper Set 9 with Answers in Hindi

पूर्णांक: 56
समय: 2 घण्टा 45 मिनट

परीक्षार्थियों के लिए सामान्य निर्देश :

  • परीक्षार्थी सर्वप्रथम अपने प्रश्न-पत्र पर नामांक अनिवार्यतः लिखें।
  • सभी प्रश्न करने अनिवार्य हैं।
  • प्रत्येक प्रश्न का उत्तर दी गई उत्तर-पुस्तिका में ही लिखें।
  • जिन प्रश्नों में आन्तरिक खण्ड हैं, उन सभी के उत्तर एक साथ ही लिखें।
  • प्रश्न का उत्तर लिखने से पूर्व प्रश्न का क्रमांक अवश्य लिखें।

खण्ड – (अ)
वस्तुनिष्ठ प्रश्न

प्रश्न 1.
निम्नलिखित प्रश्नों के उत्तर का सही विकल्प चयन कर उत्तर पुस्तिका में लिखिए
(i) सोडियम क्लोराइड क्रिस्टल की संरचना है
(अ) फलक केन्द्रित घनीय
(ब) मोनोक्लीनिक
(स) ऑर्थोरोम्बिक
(द) चतुष्कोणीय
उत्तर:
(अ) फलक केन्द्रित घनीय

(ii) गुरुत्व पृथक्करण विधि से सान्द्रित किया जाता है
(अ) कैलेमाइन को
(ब) हेमेटाइट को
(स) कैल्थोपाइराइट को
(द) बॉक्साइट को
उत्तर:
(ब) हेमेटाइट को

RBSE 12th Chemistry Model Paper Set 9 with Answers in Hindi

(iii) निम्नलिखित में से कौन-सा आयन उपसहसंयोजन यौगिक नहीं बनाता है?
(अ) Na+
(ब) Cr2+
(स) Co2+
(द) Cr3+
उत्तर:
(अ) Na+

(iv) निम्न में कौन यौगिक प्रशीतक है
(अ) CoCl2
(ब) CCl4
(स) CF4
(द) CF2Cl2
उत्तर:
(द) CF2Cl2

(v) क्लोरोफॉर्म को Zn तथा H2O से अनकृत कराने से बनता है-
(अ) एसीटिलीन
(ब) इथाइलीन
(स) इथेन
(द) मेथेन
उत्तर:
(द) मेथेन

(vi) सान्द्र H2SO4 की उपस्थिति में फीनॉल को थैलिक ऐनहाइड्राइड के साथ गर्म करने पर बनता है- (1)
(अ) थैलिक अम्ल
(ब) फीनोन
(स) क्वीनोन
(द) फिनॉल्पथेलीन
उत्तर:
(द) फिनॉल्पथेलीन

(vii) फिनॉल निम्न में से किसके निर्माण में प्रयुक्त होता है?
(अ) बेकेलाइट
(ब) पॉलिस्टाइरीन
(स) नायलॉन
(द) PVC
उत्तर:
(अ) बेकेलाइट

(viii) वह विटामिन जो जल मे विलेय नहीं है?
(अ) D
(ब) C
(स) B
(द) B
उत्तर:
(अ) D

RBSE 12th Chemistry Model Paper Set 9 with Answers in Hindi

(ix) सबसे सामान्य डाइसैकराइड्स का अणुसूत्र है?
(अ) C12H22O11
(ब) C6H18O9
(स) C10H20O10
(द) C18H32O11
उत्तर:
(अ) C12H22O11

प्रश्न 2.
रिक्त स्थानों की पूर्ति कीजिए
(i) दो सल्फाइड अयस्कों को पृथक करने के लिए …………………. का उपयोग किया जाता है।
उत्तर:
अवनमक

(ii) SiO2 एक …………………. गालक है।
उत्तर:
अम्लीय

(iii) समूह ……………. को सिक्का धातु कहते हैं।
उत्तर:
Cu, Ag, Au

(iv) [NiCl4]2- की आकृति ………………… होती है।
उत्तर:
चतुष्फलकीय

प्रश्न 3.
अतिलघूत्तरात्मक प्रश्न
(i) प्रति लौह-चुम्बकीय ठोस का एक उदाहरण दीजिए।
उत्तर:
MnO प्रतिलौह-चुम्बकीय ठोस है।

(ii) स्थिर क्वाथी मिश्रण की परिभाषा लिखिए।
उत्तर:
स्थिरक्वाथी मिश्रण-दो या दो से अधिक अवयवों का ऐसा मिश्रण जो अवयवों के संघटन के प्रभावित हुये बिना एक ही ताप पर आसवित होते हैं। स्थिर क्वाथी मिश्रण कहलाते हैं।

(iii) सामान्यतः ताप बढ़ाने पर गैसों की द्रवों में विलेयता घटती है; कारण दीजिए।
उत्तर:
स्थिर दाब पर सामान्यतः ताप बढ़ाने पर गैसों की द्रवों में विलेयता घटती है क्योंकि ताप बढ़ाने पर द्रव में गैस के अणुओं की गतिज ऊर्जा बढ़ती है जिससे गैस के बाहर निकलने की प्रवृत्ति में वृद्धि होती है।

(iv) ऐलुनाइट अयस्क का संगठन लिखिए।
उत्तर:
K2SO4, Al2(S4)3, 4Al(OH)3

RBSE 12th Chemistry Model Paper Set 9 with Answers in Hindi

(v) एक परायूरेनियम तत्व का नाम एवं प्रतीक लिखिए।
उत्तर:
प्लूटोनियम (Pu).

(vi) डाइएथिल ईथर तथा मेथिल-प्रोपिल ईथर में क्या समावयवता होती है ?
उत्तर:
इनमें मध्यावयवता पायी जाती है।

(vii) ऐमीनो के क्वथनांक संगत ऐल्केनों से उच्च क्यों होते हैं?
उत्तर:
ऐमीनों के क्वथनांक संगत ऐल्केनों से हाइड्रोजन आबन्धन के कारण उच्च होते हैं। ऐल्केनों में केवल दुर्बल वाण्डरवाल्स बल पाए जाते हैं।

(viii) डाइमेथिलेमीन, मेथिलेमीन से प्रबल क्षार है। कारण दीजिए।
उत्तर:
डाइमेथिलेमीन में दो मेथिल समूह का + I प्रभाव लगता है जबकि मेथिलेमीन में केवल एक मेथिल समूह का + I प्रभाव लगता है इसलिए डाइमेथिलेमीन में नाइट्रोजन पर इलेक्ट्रॉन घनत्व अधिक होता है। अतः डाइमेथिलेमीन अधिक क्षारीय है।

खण्ड – (ब)
लघूत्तरात्मक प्रश्न

प्रश्न 4.
निम्नलिखित जालकों में से प्रत्येक की एकक कोष्ठिका में कितने बिन्दु होते हैं? (1½)
(i) फलक-केन्द्रित घनीय
उत्तर:
फलक केन्द्रित घनीय-फलक केन्द्रित घनीय एकक कोष्ठिका में कुल जालक बिन्दु (lattice point) 14 होते हैं एवं अवयवी कणों या परमाणुओं की संख्या 4 होती है।
8 (कोने पर स्थित परमाणु) × \(\frac{1}{8}\) (परमाणुप्रतिकोना) + 6 (फलक केन्द्रित परमाणु) × \(\frac{1}{2}\) (परमाणु प्रति फलक) = 8 × \(\frac{1}{8}\) + 6 × \(\frac{1}{2}\) = 4 (परमाणु या अवयवी कण)

(ii) फलक-केन्द्रित चतुष्कोणीय
उत्तर:
फलक केन्द्रित चतुष्कोणीय- इसमें भी __ कुल जालक बिन्दु (lattice point) 14 एवं अवयवी कणों की संख्या 4 होती है।

(iii) अन्तः केन्द्रित एकक।
उत्तर:
अन्त:केन्द्रित घनीय-इसमें कुल जालक बिन्दुओं की संख्या 10 होती है एवं अवयवी कणों की संख्या निम्न प्रकार से है
8 (कोने) × \(\frac{1}{8}\) (परमाणु प्रति कोना) + 1(अन्त:केन्द्र) × 1(परमाणु प्रति अन्त:केन्द्र)
= 1 + 1 = 2 (परमाणु या अवयवी कण)

प्रश्न 5.
ऐलुमिनियम घनीय निविड संकुलित संरचना में क्रिस्टलीकृत होता है। इसका धात्विक अर्द्धव्यास 125 pm है। (1½)
(i) एकक कोष्ठिका के कोर की लम्बाई ज्ञात कीजिए।
(ii) 1.0 cm ऐलुमिनियम में कितनी एकक कोष्ठिकाएँ होंगी ?
उत्तर:
(i) एक fcc एकक कोष्ठिका के लिए r = \(\frac{a}{2 \sqrt{2}}\)
∴ a = 2√2r = 2 × 1.414 × 125
= 353.5 pm

(ii) एकक कोष्ठिका का आयतन
= a3 = (3.535 × 10-8 cm)3
= 442 × 10-25 cm3
= 442 × 10-25 cm3 आयतन
= 1 एकक कोष्ठिका का आयतन
अतः 1 cm3 आयतन में एकक कोष्ठिकाओं की संख्या
= \(\frac{1}{442 \times 10^{-25}}\)
= 2.26 × 1022 एकक कोष्ठिका

RBSE 12th Chemistry Model Paper Set 9 with Answers in Hindi

प्रश्न 6.
हेनरी का नियम तथा इसके कुछ महत्वपूर्ण अनुप्रयोग लिखिए। (1½)
उत्तर:
हेनरी का नियम-किसी गैस का वाष्प अवस्था में आंशिक दाब (p), उस विलयन में गैस के मोल अंश (x) के समानुपाती होता है।
p ∝ x
या p = KHx
जहाँ KH = हेनरी स्थिरांक

हेनरी नियम के अनुप्रयोग:
(1) सोडा जल एवं शीतल पेयों में CO2 की विलेयता बढ़ाने के लिए बोतल को अधिक दाब पर बन्द किया जाता है।
(2) अधिक ऊँचाई वाली जगहों पर ऑक्सीजन का आंशिक दाब सतही स्थानों से कम होता है अतः इन जगहों पर रहने वाले लोगों एवं आरोहकों के रुधिर और ऊतकों में ऑक्सीजन की सान्द्रता निम्न हो जाती है। इसके कारण आरोहक कमजोर हो जाते हैं और स्पष्टतया सोच नहीं पाते। इसे __’ऐनॉक्सिया’ (Anoxia) कहते हैं।

प्रश्न 7.
2.5 g एथेनोइक अम्ल (CH3COOH) के 75 g बेन्जीन में विलयन की मोललता की गणना कीजिए। (1½)
उत्तर:
विलेय का द्रव्यमान WB = 2.5g
विलेय का मोलर द्रव्यमान
MB = 12 × 2 + 1 × 4+ 16 × 2
= 60 g/mol
विलायक का द्रव्यमान WA = 75 g
मोललता m = ?
m = \(\frac{\mathrm{W}_{\mathrm{B}} \times 1000}{\mathrm{M}_{\mathrm{B}} \times \mathrm{W}_{\mathrm{A}}}\)
\(\frac{2.5 \times 1000}{60 \times 75}\) = 0.556 mol/kg
दिये गये विलयन की मोललता
= 0.556 molkg है।

प्रश्न 8.
डाइमेथिल ईथर के अपघटन से CH4, H2 तथा CO बनते हैं। इस अभिक्रिया का वेग निम्नलिखित समीकरण द्वारा दिया जाता है
वेग = k[CH3OCH3]3/2
अभिक्रिया के वेग का अनुगमन बन्द पात्र में बढ़ते दाब द्वारा किया जाता है, अत: वेग समीकरण को डाइमेथिल ईथर के आंशिक दाब के पद में भी दिया जा सकता है। अतः
वेग = k(PCH3OCH3)3/2
यदि दाब को bar में तथा समय को मिनट में मापा जाये तो अभिक्रिया के वेग एवं वेग स्थिरांक की इकाइयाँ क्या होंगी ? (1½)
उत्तर:
अभिक्रिया की कोटि = \(\frac{3}{2}\)
अतः दाब के पदों में वेग स्थिरांक का नियतांक
= (bar)1-nmin-1
= (bar)1-\(\frac{3}{2}\) min-1
= bar–\(\frac{1}{2}\) min-1
वेग स्थिरांक की इकाई = (bar)–\(\frac{1}{2}\) min-1
अभिक्रिया के वेग की इकाई = bar min-1

RBSE 12th Chemistry Model Paper Set 9 with Answers in Hindi

प्रश्न 9.
स्थिर आयतन पर N2O5(g) के प्रथम कोटि के तापीय वियोजन पर निम्न आँकड़े प्राप्त हुए
RBSE 12th Chemistry Model Paper Set 9 with Answers in Hindi 1
वेग स्थिरांक की गणना कीजिए। (1½)
उत्तर:
प्रथम कोटि की अभिक्रिया के लिए,
RBSE 12th Chemistry Model Paper Set 9 with Answers in Hindi 2

प्रश्न 10.
+3 ऑक्सीकरण अवस्था में ऑक्सीकृत होने के सन्दर्भ में Mn2+ के यौगिक Fe2+ के यौगिकों की तुलना में अधिक स्थायी क्यों है ? (1½)
उत्तर:
Mn2+ का इलेक्ट्रॉनिक विन्यास 3d5 होता है, एवं यह अर्धपूरित होने के कारण स्थायी है। इसलिए इसकी तृतीय आयनन एन्थैल्पी बहुत अधिक होती है; क्योंकि स्थायी विन्यास से तीसरा इलेक्ट्रॉन सरलता से नहीं निकलता है। वहीं दूसरी ओर Fe2+ का इलेक्ट्रॉनिक विन्यास 3d6 होता है। अतः यह सरलता से एक इलेक्ट्रॉन त्यागकर स्थायी विन्यास 3d5 प्राप्त कर सकता है। यहाँ Fe2+ से Fe3+ में परिवर्तित होने के लिए आवश्यक आयनन एन्थैल्पी का मान कम होता है। इस कारण + 3 ऑक्सीकरण अवस्था में ऑक्सीकत होने के सन्दर्भ में Mn2+ के यौगिक Fe2+ के यौगिकों की तुलना में अधिक स्थायी होते हैं।

प्रश्न 11.
लैन्थेनॉइड श्रेणी के उन सभी तत्वों का उल्लेख कीजिए, जो +4 तथा +2 ऑक्सीकरण अवस्थाएँ प्रदर्शित करते हैं। इस प्रकार के व्यवहार तथा उनके इलेक्ट्रॉनिक विन्यास के बीच सम्बन्ध स्थापित कीजिए। (1½)
उत्तर:
लैन्थेनॉइड श्रेणी में +4 ऑक्सीकरण अवस्था दर्शाने वाले तत्व हैं-
58Ce, 59Pr, 60Nd, 65Tb, 66Dy
इसी प्रकार लैन्थेनॉइड श्रेणी में +2 ऑक्सीकरण अवस्था प्रदर्शित करने वाले तत्व हैं-
60Nd, 62Sm, 63Eu, 69Tm, 70Yb
तत्व +2 ऑक्सीकरण अवस्थाएँ तब प्रदर्शित करता है जब लैन्थेनॉइडों का विन्यास 5d0 6s2 होता है जिससे दो इलेक्ट्रॉन आसानी से निकल सकें। ये +4 ऑक्सीकरण अवस्थाएँ तब प्रदर्शित करते हैं जब लैन्थेनॉइडों का शेष विन्यास 4f0 या 4f7 पर समाप्त हो। इसके अलावा 4f1, 4f2 तथा 4f8 विन्यास वाले तत्व भी +4 ऑक्सीकरण अवस्था दर्शाते हैं।

RBSE 12th Chemistry Model Paper Set 9 with Answers in Hindi

प्रश्न 12.
निम्न अभिक्रियाओं को पूर्ण कीजिए (1½)
RBSE 12th Chemistry Model Paper Set 9 with Answers in Hindi 3
उत्तर:
RBSE 12th Chemistry Model Paper Set 9 with Answers in Hindi 4

प्रश्न 13.
निम्न से फोनॉल प्राप्त करने की रासायनिक अभिक्रियाओं के समीकरण लिखिए (½ + ½ + ½ = 1½)
(अ) क्यूमीन,
(ब) बेन्ज़ीन सल्फोनिक अम्ल,
(स) बेन्जीन डाइएज़ोनियम क्लोराइड।
उत्तर:
(अ) (i) क्यूमीन से फीनॉल प्राप्त करनाक्यूमीन को वायु की उपस्थिति में क्यूमीन हाइड्रोपरॉक्साइड में ऑक्सीकृत कर लिया जाता है। तनु अम्ल के साथ क्रिया द्वारा इसे फीनॉल तथा ऐसीटोन में परिवर्तित किया जाता है। यह ऐसीटोन सहउत्पाद होता है।
RBSE 12th Chemistry Model Paper Set 9 with Answers in Hindi 5

(ब) बेन्जीन या बेन्जीन सल्फोनिक अम्ल से फीनॉल प्राप्त करना बेन्जीन का ओलियम द्वारा सल्फोनेशन किया जाता है तथा इससे प्राप्त बेन्जीन सल्फोनिक अम्ल को गलित सोडियम हाइड्रॉक्साइड के साथ गर्म करके सोडियम फीनॉक्साइड में परिवर्तित कर लिया जाता है। सोडियम लवण के अम्लीकरण से फीनॉल प्राप्त होता है।
RBSE 12th Chemistry Model Paper Set 9 with Answers in Hindi 6

(स) बेन्जीन डाइऐजोनियम क्लोराइड से-बेन्जीन डाइऐजोनियम क्लोराइड की क्रिया गर्म जल से कराने पर फीनॉल प्राप्त होता है।
RBSE 12th Chemistry Model Paper Set 9 with Answers in Hindi 7

RBSE 12th Chemistry Model Paper Set 9 with Answers in Hindi

प्रश्न 14.
निम्नलिखित पदों (शब्दों) से आप क्या समझते हैं? प्रत्येक का एक उदाहरण दीजिए (¾ + ¾ = 1½)
(अ) सायनोहाइड्रिन,
उत्तर:
सायनोहाइड्रिन (Cyanohydrin)ऐल्डिहाइड व कीटोन हाइड्रोजन सायनाइड से क्रिया करके एक योगोत्पाद बनाते हैं जिसे सायनोहाइड्रिन कहते हैं।
RBSE 12th Chemistry Model Paper Set 9 with Answers in Hindi 8
सायनोहाइड्रिन सायनोहाइड्रिन एक प्रकार के महत्वपूर्ण संश्लेषण अभिकर्मक होते हैं। इनका प्रयोग α-हाइड्रॉक्सी अम्ल बनाने में किया जाता है। उदाहरणार्थ
RBSE 12th Chemistry Model Paper Set 9 with Answers in Hindi 9

(ब) ऐसीटल,
उत्तर:
ऐसीटल (Acetal)-ऐल्डिहाइड एथिल ऐल्कोहॉल के दो मोल से अभिक्रिया करके ऐसीटल बनाते हैं।
RBSE 12th Chemistry Model Paper Set 9 with Answers in Hindi 10

प्रश्न 15.
निम्नलिखित को उनके अम्लीय सामर्थ्य के बढ़ते क्रम में लिखिए (½ + ½ + ½ = 1½)
(अ) फीनॉल, कार्बोनिक अम्ल, p-नाइट्रोफीनॉल, बेन्जोइक अम्ल
उत्तर:
फीनॉल < p-नाइट्रोफीनॉल < कार्बोनिक अम्ल < बेन्जोइक अम्ल

(ब) फीनॉल, एथेनॉल, P-क्रीसॉल, p-नाइट्रोफीनॉल, m-ऐमीनो फीनॉल, 2, 4-डाइनाइट्रोफीनॉल
उत्तर:
एथेनॉल < p-क्रीसॉल <m-ऐमीनोफीनॉल < फीनॉल < p-नाइट्रोफीनॉल < 2,4-डाइनाइट्रोफीनॉत

(स) फोनॉल, m-क्रीसॉल, m-क्लोरोफीनॉल, m-नाइट्रोफीनॉल
उत्तर:
m-क्रीसॉल < फीनॉल <m-क्लोरोफीनॉल < m-नाइट्रोफीनॉल

खण्ड – (स)
दीर्घ उत्तरीय प्रश्न

प्रश्न 16.
(अ) कारण सहित बताइए कि निम्न में अभिक्रिया की कोटि क्या होगी?
2FeCl3 + SnCl2 → SnCl + 2FeCl2
(ब) तापीय गुणांक क्या है? अभिक्रिया के वेग से इसका सम्बन्ध बताइए।
(स) एक प्रथम कोटि की अभिक्रिया में 30% वियोजन होने में 40 मिनट लगते हैं। t1/2 की गणना कीजिए। (1 + 1 + 1 + = 3)
अथवा
(अ) अभिक्रिया के वेग तथा वेग व्यंजक में अन्तर लिखिए।
(ब) अभिक्रिया 2A + B → उत्पाद हेतु अवकलन वेग समीकरण लिखिए।
(स) दर्शाइए कि प्रथम कोटि की अभिक्रिया में 99% अभिक्रिया पूर्ण होने में लगा समय 90% अभिक्रिया पूर्ण होने में लगने वाले समय से दोगुना होता है। (1 + 1 + 1 = 3)
उत्तर:
(अ) अभिक्रिया तृतीय कोटि की है, क्योंकि तृतीय कोटि की अभिक्रिया में अभिकारक पदार्थ के तीन अणुओं का सान्द्रण समय के साथ-साथ परिवर्तित होता है अर्थात् इनका वेग अभिकारक के तीन अणुओं के सान्द्रण के रूप में व्यक्त होता है।

(ब) तापीय गुणांक 10°C अन्तर के दो भिन्न तापों पर वेग स्थिरांकों के अनुपात के बराबर होता है। वेग स्थिरांक का तापीय गुणांक
RBSE 12th Chemistry Model Paper Set 9 with Answers in Hindi 11RBSE 12th Chemistry Model Paper Set 9 with Answers in Hindi 11
यह प्राप्त मान 2 और 3 के मध्य में होता है।

(स)
RBSE 12th Chemistry Model Paper Set 9 with Answers in Hindi 12

RBSE 12th Chemistry Model Paper Set 9 with Answers in Hindi

प्रश्न 17.
(अ) निम्नलिखित यौगिकों को क्वथनांकों के बढ़ते हुए क्रम में व्यवस्थित कीजिए
(i) ब्रोमोमेथेन, ब्रोमोफॉर्म, क्लोरोमेथेन, डाइब्रोमोमेथेन।
(ii) 1-क्लोरोप्रोपेन, आइसोप्रोपिल क्लोराइड, 1-क्लोरोब्यूटेन।
(ब) β-विलोपन को समझाइए। (2 + 1 = 3)
अथवा
(अ) निम्नलिखित प्रश्नों के उत्तर लिखिए.
(i) निम्नलिखित यौगिकों में से कौन-सा KOH द्वारा अधिक सरलता से जल अपघटित होता है और क्यों ?
CH3CHClCH2CH3 अथवा CH3CH2CH2Cl
(ii) इनमें से कौन SN2 प्रतिस्थापन अभिक्रिया तेजी से करता है और क्यों ?
RBSE 12th Chemistry Model Paper Set 9 with Answers in Hindi 13
(ब) कार्बिल एमीन अभिक्रिया पर टिप्पणी लिखिए। (2 + 1 = 3)
उत्तर:
(अ) (i) क्लोरोमेथेन < ब्रोमोमेथेन < डाइब्रोमोमेथेन .< ब्रोमोफॉर्म
(अणुभार बढ़ने पर क्वथनांक बढ़ता जाता है।)

(ii) आइसोप्रोपिल क्लोराइड < 1-क्लोरोप्रोपेन < 1-क्लोरोब्यूटेन
(शाखित होने के कारण आइसोप्रोपिल क्लोराइड का गलनांक 1-क्लोरोप्रोपेन से कम होगा।)

(ब) हैलोऐल्केन β विलोपन को प्रदर्शित करती हैं। जबं β हाइड्रोजन परमाणु युक्त हैलोऐल्केन को KOH के जलीय विलयन के साथ गर्म किया जाता है, तो β-कार्बन से हाइड्रोजन परमाणु तथा α-कार्बन से हैलोजन परमाणु का विलोपन होता है तथा उत्पाद के रूप में ऐल्कीन प्राप्त होती है। यहाँ विलोपन अभिक्रिया में β-हाइड्रोजन परमाणु भाग लेता है। अतः यहह अभिक्रिया β-विलोपन कहलाती है।
RBSE 12th Chemistry Model Paper Set 9 with Answers in Hindi 14

प्रश्न 18.
(अ) ऐलिफैटिक एवं ऐरोमैटिक प्राथमिक ऐमीनों की नाइट्रस अम्ल से अभिक्रिया लिखिए
(ब) निम्नलिखित में प्रत्येक का सम्भावित कारण बताइए
(i) समतुल्य अणु द्रव्यमान वाले ऐमीनों की अम्लता ऐल्कोहॉलों से कम होती है।
(ii) प्राथमिक ऐमीनों का क्वथनांक तृतीयक ऐमीनों से अधिक होता है। (1 + 2 = 3)
अथवा
(अ) अमीनो अपघटन पर टिप्पणी लिखिए।
(ब) प्राथमिक, द्वितीयक एवं तृतीयक ऐमीनों की पहचान की विधि का वर्णन कीजिए। (1 + 2 = 3)
उत्तर:
(अ) ऐलिफैटिक प्राथमिक ऐमीनों की नाइट्रस अम्ल से क्रिया-
RBSE 12th Chemistry Model Paper Set 9 with Answers in Hindi 15

(ब) (i) किसी ऐमीन से एक प्रोटॉन निकलने पर ऐमाइड आयन प्राप्त होता है, जबकि ऐल्कोहॉल से एक प्रोटॉन निकलने पर ऐल्कॉक्साइड आयन प्राप्त होता है जैसा कि निम्नवत् दर्शाया गया है-
RBSE 12th Chemistry Model Paper Set 9 with Answers in Hindi 16
चूँकि N की तुलना में 0 अधिक विद्युत-ऋणात्मक है, इसलिए RO- पर ऋणावेश RNH- की तुलना में अधिक सरलता से रह सकता है।
दूसरे शब्दों में ऐमीन ऐल्कोहॉल से कम अम्लीय होती है।

(ii) प्राथमिक ऐमीनों का क्वथनांक तृतीयक ऐमीनों से अधिक होता है क्योंकि प्राथमिक ऐमीनों में नाइट्रोजन पर हाइड्रोजन अणु उपस्थित होते हैं जिस कारण अन्तराआण्विक हाइड्रोजन आबन्ध बनता है जो कि प्राथमिक ऐमीन के क्वथनांक को बढ़ा देता है, जबकि तृतीयक ऐमीन में नाइट्रोजन पर हाइड्रोजन अणुओं की अनुपस्थिति के कारण हाइड्रोजन आबन्ध नहीं बनता और क्वथनांक कम हो जाता है।
RBSE 12th Chemistry Model Paper Set 9 with Answers in Hindi 17

RBSE 12th Chemistry Model Paper Set 9 with Answers in Hindi

खण्ड – (द)
निबन्धात्मक प्रश्न

प्रश्न 19.
(अ) दो-दो उदाहरण देते हुए निम्नलिखित को समझाइए
(i) उपसहसंयोजन संख्या
(ii) उपसहसंयोजन बहुफलक
(iii) होमोलेप्टिक
(ब) निम्नलिखित उपसहसंयोजन सत्ता में कितने ज्यामितीय समावयव सम्भव हैं ?
(i) [Cr(C2O4)3]3-
(ii) [Co(NH3)3Cl] (3 + 1 = 4)
अथवा
(अ) [MnBr4]2- के ‘केवल-प्रचक्रण’ चुम्बकीय आघूर्ण का मान 5.9 BM है। संकुल आयन की ज्यामिति बताइए।
(ब) निम्नलिखित दो उपसहसंयोजन सत्ता में से कौन-सा काइरल (ध्रुवण घूर्णक) है?
(i) समपक्ष [CrCl2,(Ox)2]3-
(ii) विपक्ष [CrCl2 (Ox)2]3-
(स) [Fe(NH3)2(CN)4]– के ज्यामितीय समावयवों की संरचना दर्शाइए। (1 + 2 + 1 = 4)
उत्तर:
(अ) (i) उपसहसंयोजन संख्या-एक संकुल में धातु आयन की उपसहसंयोजन संख्या उससे आबंधित लिगैण्डों के उन दाता परमाणुओं की संख्या के बराबर होती है, जो सीधे धातु आयन से जुड़े हों।
उदाहरण: [PtCl6]2- तथा [Ni(CH3)4]2+ में Pt की उपसहसंयोजन संख्या 6 तथा Ni की उपसहसंयोजन संख्या 4 है।

(ii) उपसहसंयोजन बहुफलक- केन्द्रीय परमाणु/आयन से सीधे जुड़े लिगैण्ड परमाणुओं की दिक् स्थान व्यवस्था को सामान्य बहुफलक कहते हैं। इनमें अष्टफलकीय, वर्ग समतलीय तथा चतुष्फलकीय मुख्य हैं।
उदाहरण- [Co(NH3)6]3+ अष्टफलकीय तथा [Ni(CO)4] चतुष्फलकीय होता है।
RBSE 12th Chemistry Model Paper Set 9 with Answers in Hindi 18
RBSE 12th Chemistry Model Paper Set 9 with Answers in Hindi 19

(iii) होमोलेप्टिक (Homoleptic)-संकुल जिसमें धातु परमाणु केवल एक प्रकार के दाता समूह से जुड़ा रहता है, होमोलेप्टिक संकुल कहलाता है।
उदाहरणार्थ- [Co(NH3)6]3+ तथा [Fe(CN)6]4- आदि।

(ब) (i) [Cr(C2O4)3]3- के कोई भी ज्यामितीय समावयव सम्भव नहीं हैं।
(ii) [Co(NH3)3(Cl)3]-इस संकुल में दो ज्यामितीय समावयव है।
RBSE 12th Chemistry Model Paper Set 9 with Answers in Hindi 20

RBSE 12th Chemistry Model Paper Set 9 with Answers in Hindi

प्रश्न 20.
(अ) क्या होता है जब
(i) फॉर्मेल्डिहाइड की क्रिया सान्द्र कॉस्टिक पोटाश विलयन से कराते हैं।
(ii) ऐसीटैल्डिहाइड पर तनु कॉस्टिक सोडा विलयन की क्रिया होती है।
(iii) सोडियम बाइसल्फाइट का संतृप्त विलयन ऐसीटैल्डिहाइड या ऐसीटोन में डाला जाता है।
(ब) निम्न को पूर्ण कीजिए-
RBSE 12th Chemistry Model Paper Set 9 with Answers in Hindi 21
अथवा
(अ) आप बेन्जीन से बेन्जोइक अम्ल किस प्रकार बनायेंगे?
(ब) निम्नलिखित यौगिकों को अम्लीयता के बढ़ते क्रम में व्यवस्थित कीजिए तथा अपने उत्तर को समझाइए-
(i) ब्यूटेनोइक अम्ल
(ii) 2-क्लोरोब्यूटेनोइक अम्ल
(स) फेनिल ऐसीटिक अम्ल की संरचना बनाइए तथा IUPAC नाम लिखिए। (1 + 2 + 1 = 4)
उत्तर:
(अ) (i) यह कैनिजारो अभिक्रिया प्रदर्शित करती है तथा मेथिल ऐल्कोहॉल और पोटैशियम फॉर्मेट बनते हैं।
RBSE 12th Chemistry Model Paper Set 9 with Answers in Hindi 22

(ii) संघनित होकर ऐल्डोल बनता है।
RBSE 12th Chemistry Model Paper Set 9 with Answers in Hindi 23

(iii) क्रिस्टलीय बाइसल्फाइट यौगिक बनते हैं।
RBSE 12th Chemistry Model Paper Set 9 with Answers in Hindi 24

(ब) (i)
RBSE 12th Chemistry Model Paper Set 9 with Answers in Hindi 25

(ii)
RBSE 12th Chemistry Model Paper Set 9 with Answers in Hindi 26

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