Series : ONS/1 Chemistry (Theory)
* Please check that this question paper contains 11 printed pages.
* Code number given on the right hand side of the question paper should be written on the title
page of the answer-book by the candidate.
*Please check that this question paper contains 26 questions.
* Please write down the Serial Number of the questions before attempting it.
* 15 minutes time has been allotted to read this question paper. The question paper will be
distributed at 10.15 a.m. From 10.15 a.m. to 10.30 a.m., the student will read the question
paper only and will not write any answer on the answer script during this period.
5. Write the main reason for the stability for colloidal sols.
Ans. Due to solvation and charge present.
6. From the given cells:
Lead storage cell, Mercury cell, Fuel cell and Dry cell
Answer the following:
(i) Which cell is used in hearing aids?
(ii) Which cell was used in Apollo Space Programme?
(iii) Which cell is used in automobiles and inverters?
(iv) Which cell does not have long life?
Ans. (i) Mercury cell (ii) Fuel cell
(iii) Lead storage cell (iv) Dry cell
23. Due to hectic and busy schedule, Mr. Angad made his life full of tension and anxiety. He started
taking sleeping pills to overcome the depression without consulting the doctor. Mr. Deepak, a
close friend of Mr. Angad, advised him to stop taking sleeping pills and suggested to change his
lifestyle by doing yoga, meditation and some physical exercise. Mr. Angad followed his friend’s
advice and after few days he started feeling better.
After reading the above passage, answer the following
(a) What are the values (at least two) displayed by Mr. Deepak?
(b) Why is it not advisable to take sleeping pills without consulting doctor?
(c) What are tranquilizers ? Give two examples.
Ans. (a) Friendly
Knows harmful effects of sleeping pills.
(b) It is not advisable to take sleeping pills without consulting doctor because it can be
dangerous and life threatning.
(c) Medicines which are used to cure anxiety & depression are called tranquilizers e.g.
equanil, phenelzine
* Please check that this question paper contains 11 printed pages.
* Code number given on the right hand side of the question paper should be written on the title
page of the answer-book by the candidate.
*Please check that this question paper contains 26 questions.
* Please write down the Serial Number of the questions before attempting it.
* 15 minutes time has been allotted to read this question paper. The question paper will be
distributed at 10.15 a.m. From 10.15 a.m. to 10.30 a.m., the student will read the question
paper only and will not write any answer on the answer script during this period.
5. Write the main reason for the stability for colloidal sols.
Ans. Due to solvation and charge present.
6. From the given cells:
Lead storage cell, Mercury cell, Fuel cell and Dry cell
Answer the following:
(i) Which cell is used in hearing aids?
(ii) Which cell was used in Apollo Space Programme?
(iii) Which cell is used in automobiles and inverters?
(iv) Which cell does not have long life?
Ans. (i) Mercury cell (ii) Fuel cell
(iii) Lead storage cell (iv) Dry cell
23. Due to hectic and busy schedule, Mr. Angad made his life full of tension and anxiety. He started
taking sleeping pills to overcome the depression without consulting the doctor. Mr. Deepak, a
close friend of Mr. Angad, advised him to stop taking sleeping pills and suggested to change his
lifestyle by doing yoga, meditation and some physical exercise. Mr. Angad followed his friend’s
advice and after few days he started feeling better.
After reading the above passage, answer the following
(a) What are the values (at least two) displayed by Mr. Deepak?
(b) Why is it not advisable to take sleeping pills without consulting doctor?
(c) What are tranquilizers ? Give two examples.
Ans. (a) Friendly
Knows harmful effects of sleeping pills.
(b) It is not advisable to take sleeping pills without consulting doctor because it can be
dangerous and life threatning.
(c) Medicines which are used to cure anxiety & depression are called tranquilizers e.g.
equanil, phenelzine
