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

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

Question # 2

Ozone acts as:

Question # 3

Which of the following substance is not present in acid rain?

Question # 4

Which one of the following is not air pollutant gas

Question # 5

A single chloride free radical can destroy the ozone molecules

Question # 6

In purification of potable water the coagulant used is:

Question # 7

Air pollution causes

Question # 8

Biological oxygen demand (BOD) is associated with

Question # 9

Which gases are produced from landfills?

Question # 10

In the atmosphere, O2is about

Question # 11

In the atosphere, CO2is about

Question # 12

How can heavy metal contamination like the presence of Hg or Pb may be removed from the soil

Question # 13

Leaching of nutrients is due to

Question # 14

Part of fresh water consumed in domestic purpose:

Question # 15

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

Question # 16

Detergent greatly effects the

Question # 17

Biochemical oxygen demand (BOD) is the capacity of organic matter in natural water to consume oxygen with in a period of

Question # 18

Synthetic organic pesticides formulated nowadays are more then:

Question # 19

Eleven elements made part of earth mass:

Question # 20

Acidification of soil can leach metal:

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MCAT Chemistry Chapter 21 Important MCQ's

Sr.# Question Answer
1 Coal contains sulphur in it:
A. 1-3%
B. 1-6%
C. 1-9%
D. 1-12%
2 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
3 Ecosystem is a smaller unity of
A. Nydosphere
B. Biosphere
C. Lithosphere
D. Attmosphere
4 Dissolved impurities of potable water can be separated by the process of
A. reduction
B. Aeration
C. Electrolysis
D. Co-angulation
5 Elevated concentration of ______________ is harmful for fish as it clog the gills causing suffocation
A. AI
B. Hg
C. As
D. Cr(vi)
6 Commonly used coagulants are ions of:
A. Ferrous
B. Al
C. Cr
D. Ferric
7 Which of the following is a macronutrient?
A. Boron
B. Iron
C. Copper
D. Carbon
8 Nitrogen in the atmosphere is:
A. 78%
B. 21%
C. 0.9%
D. 0.03%
9 Which is not the affect of polluted air on environment
A. acid rain
B. smog
C. ozone
D. global warming
10 SO2 produced by volcanoes is about
A. 75%
B. 67%
C. 69%
D. 70%

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