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

00:00
Question # 1

Fungicides are the pesticides which

Question # 2

Which gas produces air pollution?

Question # 3

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

Question # 4

Ecology is a science of environment and deals specially with

Question # 5

Atmosphere consists of gasses:

Question # 6

Chemical like Al2(SO4) or alum are used in purification of water druing step:

Question # 7

Newspaper can be recycled again and again by how many times?

Question # 8

Coagulation removes suspended particles in ran water:

Question # 9

Part of fresh water consumed in industry is:

Question # 10

Polar ice caps and glaciers consists total earth water:

Question # 11

Hydrocarbons, SO2, CO, NH3nitrogen oxides and compounds of fluorine are called

Question # 12

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 # 13

Which one of the following is an organic compound?

Question # 14

Which is used as a coagulant:

Question # 15

Why a C- C bond breaks by uv light

Question # 16

Lithosphere has amount of silicon

Question # 17

BOD is the oxygen demand with in day(s):

Question # 18

Global warming is mainly caused by ______ radiations

Question # 19

Which of the following is not a heavy industry?

Question # 20

Ozone is a gas having boiling point

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MCAT Chemistry Chapter 21 Important MCQ's

Sr.# Question Answer
1 Oceans, rivers, streams, leaks, polar ice caps, glaciers and group water reservoirs are included in
A. Atmosphere
B. Lithosphere
C. Hydrosphere
D. Biosphere
2 BOD is the oxygen demand with in day(s):
A. Four
B. Two
C. Three
D. Five
3 Biochemical oxygen demand is the capacity of organic matter in natural water to consume oxygen
A. 2 days
B. 5 days
C. 6 days
D. 7 days
4 Which one of the following is an organic compound?
A. Calcium carbide
B. Calcium cyanide
C. Carbon disulphide
D. None of these 
5 The range of UV-B is:
A. 320 to 400 nm
B. 200 to 280 nm
C. 280 to 320 nm
D. 50 to 400 nm
6 Commonly used coagulants are ions of:
A. Ferrous
B. Al
C. Cr
D. Ferric
7 Insoluble ferric oxide is produced in the pH range:
A. 1 to 8
B. 6 to 9
C. 3 to 13
D. 8 to 13
8 CFCs are mainly used in industries due to
A. Low cost
B. Gaseous nature
C. High reactivity
D. Un stability
9 Contamination of Hg comes into surface water from chlor industrial wastes. Why is Hg toxic
A. It attaches to sulphur of the disulphide link
B. Hg is a heavy metal
C. Hg is liquid at room temperature
D. Hg is reactive chemically
10 One of the environment problem is the formation of oil slicks when oil is spilled from tankers in sea water.
Which treatment is suitable to remove oil slicks
A. blow air
B. add Na2CO3
C. use a specially made sorbent having fluorine trapped in it
D. Use a sorbent having Al2O3trapped in it

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