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

Biochemical oxygen demand is the capacity of organic matter in natural water to consume oxygen

Question # 2

Smaller unit of biosphere is:

Question # 3

Coal contains sulphur in it:

Question # 4

Sulphate aerosols cause severe respiratory problems particularly among

Question # 5

Which one of the following is used as coagulant for purification potable water

Question # 6

Ozone is usually produced in the

Question # 7

Ozone acts as:

Question # 8

Acid rain is caused when various atmospheric gases dissolve in rain water. What are the gases that cause rain water

Question # 9

The temperature of in the incineration of industrial and hazardous waste process has range

Question # 10

The smog having high contents of SO2is

Question # 11

Part of fresh water consumed in industry is:

Question # 12

The reason of acid rains is

Question # 13

The toxic organic compounds and heavy metals and metalloids results in contamination of

Question # 14

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

Question # 15

Photo chemical smog contains ______ as main reactants

Question # 16

The disposal of domestic refuse, commercial and industrial solid wastes are studied under the title

Question # 17

Residence time of methane in the atmosphere is

Question # 18

Troposphere extends upto km:

Question # 19

Oceans cove ____________ percent of the surface of the earth

Question # 20

Which is not the condition for the formation of smog

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MCAT Chemistry Chapter 21 Important MCQ's

Sr.# Question Answer
1 Newspaper can be recycled again and again by how many times?
A. 2
B. 3
C. 4
D. 5
2 Hardness which can be removed by boiling is called
A. Permanent hardness
B. Temporary hardness
C. Stiffness
D. Toughness
3 Atmosphere consists of gasses:
A. N2
B. O2
C. Ar
D. All
4 Density of water becomes maximum at
A. 10°C
B. 4°C
C. 5°C
D. 12°C
5 Ozone is a gas having boiling point
A. Unstable
B. High
C. Low
D. Moderate
6 Chemicals used to kill herbs are:
A. Herbicides
B. Insecticides
C. Pesticides
D. Fungicides
7 Polar ice caps can melt due to
A. Acid rain
B. Green House Effect
C. Smog
D. Chlorofluorocarbons
8 Coagulation removes suspended particles in ran water:
A. 60%
B. 70%
C. 80%
D. 90%
9 a hole used to dump the municipal wastes is called:
A. landfill
B. effluents
C. leachate
D. inclneration
10 Nitrogen percentage in atmosphere is:
A. 76%
B. 77%
C. 78%
D. 79%

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