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

Test of incomplete combustion of petrol in the presence of

Question # 3

White marble buildings are effected by?

Question # 4

Which factor is helping to reduce the environment pollution

Question # 5

The normal amount of overhead ozone is about in DU:

Question # 6

The semi solid wastes in landfills is called:

Question # 7

What is the effect of polluted air on environment

Question # 8

The words smog is a combination of smoke and:

Question # 9

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 # 10

Ozone layer is high:

Question # 11

Half of the mass of atmosphere is concentrated above earth at the hieght of

Question # 12

Photochemical smog consists of higher concentration of:

Question # 13

The respiration process taking place in animals depends on a difference in 

Question # 14

The force which hold the atoms together to form a compound is called:

Question # 15

Choose the chief air pollutant among the following which depletes ozone layer

Question # 16

Chlorofluorocarbon, CF2Cl2, plays an effective role in removing O3(ozone) in the stratosphere. Which reaction does not cause the depletion of ozone

Question # 17

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

Question # 18

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

Question # 19

The normal amount of overhead ozone is about

Question # 20

NO and NO2gases in atmosphere are represented by

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MCAT Chemistry Chapter 21 Important MCQ's

Sr.# Question Answer
1 Choose the correct statements
A. SO2affects the nucleus
B. SO2affects plasmodesmata
C. SO2affects cell wall
D. SO2affects all membrane systems
2 Water is essential for life on
A. Moon
B. Space
C. Earth
D. Sun
3 The water is considered to be polluted when the concentration of oxygen in it is
A. 6 - 9ppm
B. 6 ppm
C. 8 ppm
D. Less than 4pm
4 Which of the following air pollutant is called quiet killer
A. PAN
B. CO
C. NO3
D. SO3
5 How much quantity of total water is available as fresh water
A. 3%
B. 1%
C. 10%
D. 21%
6 The layer of earth around the earth is called:
A. Atmosphere
B. Hydrosphere
C. Lithosphere
D. Biosphere
7 The amount of Si in the lithosphere is about
A. 27.72%
B. 30.35%
C. 35.30%
D. 40.21%
8 Chemicals used to kill pests are:
A. Herbicides
B. Insecticides
C. Pesticides
D. fungicides
9 Part of fresh water consumed in industry is:
A. 1%
B. 2%
C. 69%
D. 23%
10 Transformation is a cyclic process in which used plactic is
A. Remelted and styrene is added
B. Converted into low quality substance
C. Converted back into original components
D. None of these

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