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

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MDCAT Chemistry Chapter 21 Environmental Chemistry Online Test

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Question # 1

CFCs are mainly used in industries due to

Question # 2

Synthetic organic pesticides formulated nowadays are more then:

Question # 3

Contamination of Hg comes into surface water from chlor industrial wastes. Why is Hg Toxic.

Question # 4

Which not a method for solid waste management>

Question # 5

Ozone is usually produced in the

Question # 6

Global warming is mainly caused by ______ radiations

Question # 7

Residence time of methane in the atmosphere is

Question # 8

Chose a point which is not included in the components of environment

Question # 9

BOD means

Question # 10

Petroleum or crude oil is a complex mixture of compounds mainly:

Question # 11

A single chloride free radical can destroy the ozone molecules

Question # 12

Ecology is a science of environment and deals specially with

Question # 13

The percentage of SO2 produced by volcanoes is:

Question # 14

Water which forms scum with soap is called

Question # 15

One of the environmental problem is the formation of oil slicks when oil is spilled form tankers in sea water. Which treatment is suitable to remove oil slicks

Question # 16

Water is purified by:

Question # 17

By the mid of 1980s depletion of total overhead ozone in antarctic region is

Question # 18

HOCl is a compound:

Question # 19

Hard water can block radiators due to formation of

Question # 20

The normal amount of overhead ozone is

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MCAT Chemistry Chapter 21 Important MCQ's

Sr.# Question Answer
1 The concentration of dissolved molecular oxygen in water which acts as the most important oxidizing agent ranges from
A. 2 ppm - 6 ppm
B. 2 ppm - 4 ppm
C. 4 ppm - 8 ppm
D. 2 ppm - 3 ppm
2 An excellent source of energy without causing pollution is
A. Fossil fuel
B. Sun
C. Petroleum
D. Nuclear reactor
3 99.5% mass of lithosphere is made of
A. 03 elements
B. 8 elements
C. 11 elements
D. 15 elements
4 Water cover earth surface more than:
A. 50%
B. 60%
C. 70%
D. 80%
5 Photo chemical smog contains ______ as main reactants
A. Nitrons oxide and unburnt hydrocarbons
B. Nilric oxide and unburnt hydrocarbons
C. No and burnt hydrocarbons
D. N2O and burnt hydrocarbons
6 Men residence time of methane in atmosphere in years is:
A. 1-7
B. 2-7
C. 3-7
D. 4-7
7 Lithosphere has amount of silicon
A. 35.30%
B. 27.72%
C. 40.01%
D. 21.13%
8 Volcanoes produce SO2:
A. 47%
B. 57%
C. 67%
D. 77%
9 Synthetic organic pesticides formulated nowadays are more then:
A. One thousand
B. Ten thousand
C. Two thousands
D. Twenty thousand
10 What change in plants indicates toxic effect of SO2
A. Weathering of leaves
B. Darkening of leaves
C. Falling of leaves
D. Bleaching of leaves

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