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

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

Question # 2

Increased awareness of environment issues has led chemist to develop products and processes that do not impact on the environment in terms of pollution or depletion of sources. To help chemist to achieve this aim, some principles are drawn, which one is not the guiding principle

Question # 3

Heat balance of earth is maintained by sphere:

Question # 4

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

Question # 5

Transportation causes to produce CO2 in atmosphere:

Question # 6

The bonding occurs among polar covalent molecules containing H and one of the small electronegative element such as O,F or N is called:

Question # 7

Water exist in only

Question # 8

Ozone in stratosphere extends upto km:

Question # 9

Why is carbon monoxide called as pollutant? The reason is that

Question # 10

Which factor is helping to reduce the environmental pollution

Question # 11

Three elements needed for the healthy growth of plants are

Question # 12

Which one of the following does not act as pollutant

Question # 13

A single free chlorine redical can destroy ozone molecules upto:

Question # 14

Which one of the pollutants of automobile exhausts affects the nervous system or produces mental diseases

Question # 15

Coal contains sulphur in it:

Question # 16

Ozone is usually produced in the

Question # 17

Which of the following is not a secondary pollutant

Question # 18

Elevated concentration of ______________ is harmful for fish as it clog the gills causing suffocation

Question # 19

Coal contains percentage of sulphur:

Question # 20

Polar ice caps and glaciers consists total earth water:

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MCAT Chemistry Chapter 21 Important MCQ's

Sr.# Question Answer
1 Contamination of water of tanning industries is due to:
A. Cr(III)
B. Cr(VI)
C. Mn(III)
D. Mn(VII)
2 Chemical like Al2(SO4) or alum are used in purification of water druing step:
A. aeration
B. coagulation
C. chlorination
D. treatment
3 Ocean contains part earth's water:
A. 95%
B. 96%
C. 97%
D. 98%
4 Proxy acetyl nitrate (PAN) is an irritant to human beings and it affect
A. Nose
B. Stomach
C. Eyes
D. Ears
5 Ecosystem is a smaller unit of
A. Hydrosphere
B. Lithosphere
C. Biosphere
D. Atmosphere
6 Commonly used coagulants are ions of:
A. Ferrous
B. Al
C. Cr
D. Ferric
7 Which is not considered as pollutant
A. O3
B. CO2
C. NO2
D. SO2
8 Density of water becomes maximum at
A. 10°C
B. 4°C
C. 5°C
D. 12°C
9 Global warming is mainly caused by ______ radiations
A. UV
B. I.R
C. gama
D. X-rays
10 Exposure to CO results in
A. Headche
B. Fatigue
C. Unconsciousness
D. All of these

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