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

SO2 produced by volcanoes is about

Question # 2

Most harmful of biosphere is

Question # 3

Oceans, rivers, streams, leaks, polar ice caps, glaciers and group water reservoirs are included in

Question # 4

What change in plants indicates toxic effect of SO2

Question # 5

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

Question # 6

DDT is a:

Question # 7

Chemicals used to kill insects are:

Question # 8

Volcanoes produce SO2:

Question # 9

The suspended particles in the raw water can be removed by the

Question # 10

Alkali metals react viotlently with halogens:

Question # 11

Detergent greatly effects the

Question # 12

Lithosphere has amount of silicon

Question # 13

The normal amount of overhead ozone is about in DU:

Question # 14

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

Question # 15

The semi solid wastes in landfills is called:

Question # 16

During thunderstorms, water dissolves

Question # 17

Water which forms scum with soap is called

Question # 18

Which one of the following is not a component of environment

Question # 19

Temporary hardness can be removed by adding

Question # 20

Main cause of reducing map is:

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MCAT Chemistry Chapter 21 Important MCQ's

Sr.# Question Answer
1 Ratio of hydrogen (H) and oxygen (O) in water molecule by volume is
A. 2: 1
B. 1: 2
C. 3: 1
D. 4: 1
2 Industrial effluents have toxic synthetic organic compounds as well as heavy metals like
A. Pb
B. Cr
C. Hg
D. All of these
3 The pH of the rain water in areas where acid rain is the cause of pollution may be
A. 6.5
B. 5.6
C. 4.5
D. 2.2
4 Which heavy metals do not have any safe limits
A. As
B. Hg
C. Cr
D. All of these
5 Hydrosphere includes
A. Seas and rivers
B. Ocean & polar ice caps
C. Ground water
D. All of above
6 Oceans cove ____________ percent of the surface of the earth
A. 60
B. 70
C. 80
D. 97
7 The pH rain of acid rain is
A. 8 - 7
B. 7 - 6.5
C. 6.5 - 6
D. less than 5
8 Ozone layer is present in
A. Troposphere
B. Stratosphere
C. Mesosphere
D. Ionosphere
9 Pan is an irritant to human beings and it affects
A. Eyes
B. Nose
C. Hair
D. Skin
10 Surface and ground water sources are contaminated by various human activities. Which of the following is not human activity that causes contamination in fresh water
A. Live stock waste
B. Oil leaks and spills
C. Desposal of industrial effluents
D. Rain

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