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

  • Total Questions20

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MDCAT Chemistry Chapter 21 Environmental Chemistry Online Test

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Question # 1

The layer of earth around the earth is called:

Question # 2

In the atosphere, CO2is about

Question # 3

The region of earth capable of supporting life is

Question # 4

Transformation is a cyclic process in which used plactic is

Question # 5

Which one is more toxic?

Question # 6

Value of chemical oxygen demand (COD) is a measure of chemically oxidizable matter in water. Which value of COD will indicate more polluted water

Question # 7

Exhaust fumes of cars contain which poisonous gas

Question # 8

The destructive distillation of coal gives three products. which of following is not the product of destructive distillation of coal?

Question # 9

Lead pollution is mainly due to

Question # 10

Ozone is produced in regions:

Question # 11

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

Question # 12

Part of fresh water consumed in industry is:

Question # 13

What is the effect of polluted air on environment

Question # 14

Atmosphere consists of gasses:

Question # 15

The main pollutant of leather in the waste water is due to the salt of:

Question # 16

The pH of the rain water in areas where acid rain is the cause of pollution may be

Question # 17

The smog having high contents of SO2is

Question # 18

The film forming components of paints are

Question # 19

Potable water is considered to be

Question # 20

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

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MCAT Chemistry Chapter 21 Important MCQ's

Sr.# Question Answer
1 Which is not an air pollutant
A. N2
B. CO
C. NO
D. N2O
2 Leather tanneries use big auantities of:
A. Cr Vi salts
B. Cr III salts
C. Mn-salts
D. Pb-salts
3 Which one of the following is used as coagulant for purification potable water
A. Copper sulphate
B. Alum
C. Barium sulphate
D. Nickel sulphate
4 During thunderstorms, water dissolves
A. Dust particles
B. HCl
C. Nitric acid
D. Clouds
5
Three elements needed for the healthy growth of plants are
A. N P K
B. N K C
C. N S P
D. N Ca P
6
Which of the following is not a heavy industry?
A. Iron
B. Fertilize
C. Paper
D. None
7 The main pollution of leather tanneries in the waste is due to the salt of
A. Chromium
B. Copper
C. Chromium
D. Lead
8 During incineration temperature range of non-rotating chamber is
A. 900-1000C°
B. 650-1100C°
C. 950-1300C°
D. 700-900C°
9 Ozone is effectively removed by
A. TNT
B. CFCs
C. PVC
D. CNG
10 The smog having high contents of SO2is
A. Neutral smog
B. Reducing smog
C. Oxidizing smog
D. Artificial smog

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