MDCAT Chemistry Chapter 21 MCQ Test With Answer for (Environmental Chemistry)

Chapter 21 is an important part of MDCAT Chemistry that covers polymers and biological macromolecules. It includes the formation and uses of addition polymers like polyethene, polystyrene, and polyvinyl chloride (PVC), as well as condensation polymers such as polyesters (terylene) and polyamides (nylon-6,6). Understanding these topics helps students grasp how small molecules combine to form large, useful materials found in everyday life.

This chapter also explains the structure of proteins , including their primary and secondary structures , and the structure and function of nucleic acids (DNA) , which carry genetic information. By attempting the MDCAT Chemistry Chapter 21 MCQ Test with Answers , students can review key concepts, check their understanding, and strengthen their preparation for the exam.

MCQ's Test For MDCAT Chemistry Chapter 21 Environmental Chemistry Online Test

Try The MCQ's Test For MDCAT Chemistry Chapter 21 Environmental Chemistry Online Test

  • Total Questions20

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MDCAT Chemistry Chapter 21 Environmental Chemistry Online Test

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Question # 1

Which factor is helping to reduce the environmental pollution

Question # 2

A single chlorine free radical can destory how many ozone molecules

Question # 3

Term ozone hole is used for depletion of ozone during months of:

Question # 4

Surface and ground water sources are contaminated by various human activities. Which of the following is not a human activity that causes contamination in fresh water

Question # 5

The incineration may reduce volume of wastes upto:

Question # 6

CFCs destroy ozone layer. How many ozone molecule a chlorine free radical can destroy

Question # 7

Chloroform is carcinogenic:

Question # 8

Depletion of ozone is more during the month:

Question # 9

The reason of acid rains is

Question # 10

The pH of the rain water in areas where acid rain is the cause of pollution may be

Question # 11

Ozone layer is present in

Question # 12

Ocean contains part earth's water:

Question # 13

The normal amount of overhead ozone is about

Question # 14

The most important pesticides are:

Question # 15

Hard water can block radiators due to formation of

Question # 16

Main cause of reducing map is:

Question # 17

Water is purified by:

Question # 18

DDT is a:

Question # 19

Choose the chief air pollutant among the following which depletes ozone layer

Question # 20

Exhaust fumes of cars contain which poisonous gas

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MCAT Chemistry Chapter 21 Important MCQ's

Sr.# Question Answer
1

Natural water is
A. Pure
B. Impure
C. Acts as solute
D. Distilled
2 Chemicals used to kill herbs are:
A. Herbicides
B. Insecticides
C. Pesticides
D. Fungicides
3 Why a C- C bond breaks by uv light
A. Cl is most electronegative
B. Cl is volatile
C. C - Cl bond energy is smaller than that of C - H bond energy
D. uv light provides energy which is sufficient to break C - Cl bond and not C - H bond
4 SO2 produced by volcanoes is about
A. 75%
B. 67%
C. 69%
D. 70%
5 The overall effect of the photochemical smog in the after noon is built up of
A. Neutralization
B. oxidizing agent
C. Reducing agent
D. Activating agent
6 Volcanoes produce SO2:
A. 47%
B. 57%
C. 67%
D. 77%
7 Chromium (VI) is highly toxic and can cause
A. Blindness
B. Cancer
C. Liver problems
D. Blood problems
8 Which of the following factors is not used to determine the quality of water
A. COD
B. BOD
C. DO
D. Available chlorine
9 Atmosphere consists of gasses:
A. N2
B. O2
C. Ar
D. All
10 0.1M HCI having pH =1.0 it is about 100 time stronger than acetic acid what will be the pH of acetic acid:
A. 0.1 
B. 1.3
C. 2
D. 3

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