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

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Question # 1

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 # 2

Fresh water of total earth water is:

Question # 3

Leather tanneries use big auantities of:

Question # 4

Heat balance of earth is maintained by sphere:

Question # 5

Peroxyacetylnitrate (PAN) is an irritant to human beings and it affects:

Question # 6

Soil remediation means

Question # 7

Natural water is

Question # 8

Ozone gas has boiling point:

Question # 9

alum or aluminium sulphate used as coagulant in alkaline medium change into precipitate of radicals of alumimium.

Question # 10

Part of fresh water consumed in industry is:

Question # 11

Chlorination of water is effective for

Question # 12

The temperature in the incineration of industrial and hazardons waster process had a range

Question # 13

Which one of the following does not act as pollutant

Question # 14

Lead pollution is mainly due to

Question # 15

Which of the following is not a secondary pollutant

Question # 16

When chlorofluoro carbon are subjected to U.V they form

Question # 17

The region of earth capable of supporting life is

Question # 18

Chemistry related to the study of environment affected by the chemicals and pollutants is called:

Question # 19

Hydrosphere covers the surface of erath:

Question # 20

Men residence time of methane in atmosphere in years is:

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MCAT Chemistry Chapter 21 Important MCQ's

Sr.# Question Answer
1 Ocean contains part earth's water:
A. 95%
B. 96%
C. 97%
D. 98%
2 99.5% mass of lithosphere is made of
A. 03 elements
B. 8 elements
C. 11 elements
D. 15 elements
3 Choose the chief air pollutant among the following which depletes ozone layer
A. Carbon monoxide
B. Carbon dioxide
C. Chloroflurocarbons and nitrogen oxides
D. Sulphur dioxide
4 Temporary hardness can be removed by adding
A. Lime
B. Carbon
C. Oxygen
D. Slaked lime
5 It is a biodegradable pollutant
A. Salts of HG
B. DDt
C. Aluminum foil
D. Domestic fuel
6 What change in plants indicates toxic effect of SO2
A. Weathering of leaves
B. Darkening of leaves
C. Falling of leaves
D. Bleaching of leaves
7 Which of the following factors is not used to determine the quality of water
A. COD
B. BOD
C. DO
D. Available chlorine
8 Which of the following air pollutant is called quiet killer
A. PAN
B. CO
C. NO3
D. SO3
9 Region of earth capable of supporting life is called:
A. Atmosphere
B. Hydrosphere
C. Lithosphere
D. All of these
10 Part of fresh water consumed in domestic purpose:
A. 1%
B. 2%
C. 69%
D. 8%

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