Description

Chemistry (313)
Tutor Marked Assignment

Note: (i) All questions are compulsory. The marks allotted for each question are given beside the questions.
(ii) Write your name, enrollment number, AI name, and subject on the top of the first page of the answer sheet.

1. Answer any one out of the following questions in about 40-50 words.
(a) Classify the elements of group 14, 15 and 16 into metals, non-metals and metalloids. (See Lesson-3)
(b) Compare the metallic character of aluminum and potassium. (See Lesson-3)

2. Answer any one out of the following questions in about 40-50 words.
(a) Why does the application of alum to a fresh cut wound help stop bleeding? (See Lesson-8)
(b) Two beakers A and B contain ferric hydroxide sol and NaCl solution respectively. When a beam of light is allowed to converge on them, (in a darkened room), beam of light is visible in beaker A but not in breaker B. Give the reason. What is this effect called? (See Lesson-8)

3. Answer any one out of the following questions in about 40-50 words.
(a) In the given chemical reactions, indicate whether you would expect the entropy of the system to increase or decrease:
(See Lesson-10)

(b) Give reason for the following:
(i) Neither Heat (q) nor Work (w) is a state function but q + w is a state function.
(ii) A real crystal has more entropy than an ideal crystal. (See Lesson-10)

4. Answer any one out of the following questions in about 100-150 words.
(a) Write down the reactions involved during the formation of photochemical smog. (See Lesson-32)
(b) Write down the reactions involved for ozone layer depletion in the stratosphere?
(See Lesson-32)

5. Answer any one out of the following questions in about 100-150 words.
(a) Explain the pattern of variation in the oxidation states of (See Lesson-19)
(i) B to Tl (ii) C to Pb.
(b) Consider the compounds, BCl3, and CCl4. How will they ‘behave with water? Justify your answer. (See Lesson-19)

6. Prepare any one of the project out of two given below.
(a) On the occasion of World Health Day, Dr. Satpal organized a ‘health camp’ for the poor farmers living in a nearby village. After check-up, he was concerned to see that most of the farmers suffered from severe allergies, including hay fever, persistent itching of the eyes, nose, and throat, due to prolonged exposure to airborne pollutants and pesticides. He distributed free antihistamines and advised preventive measures.
Dr. Satpal immediately reported the matter to the National Human Rights Commission (NHRC). On the suggestions of NHRC, the government decided to launch awareness programs, provide medical care, financial assistance, and implement eco-friendly agricultural practices to reduce allergic diseases among the farmers across India.
(i) Write the values shown by
(a) Dr. Satpal
(b) NHRC
(ii) What types of antihistamines are commonly used for the treatment of hay fever and allergic symptoms?
(iii) Give an example of artificial sweetener that can have recommended to diabetic patients. (See Lesson-30)

(b) Mr. Naresh works in a multinational company. He is stressed due to his hectic schedule. Mr. Amit, his friend, comes to know that he has started taking sleeping pills without consulting the doctor. Mr. Amit requests ‘Naresh to stop this practice and takes him to a Yoga centre. With regular Yoga sessions, Mr. Naresh is now a happy and relaxed man.’
After reading the above passage, answer the following questions:
(i) Write the values shown by Mr. Amit to Mr. Naresh in your own words.
(ii) Which class of drugs is used in sleeping pills?
(iii) Why is it not advisable to take sleeping pills without consultation with the doctor? (See Lesson-30)