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

Ozone gas has boiling point:

Question # 2

The yellow color present in the photo chemical smog is due to presence of the

Question # 3

Depletion of ozone is more during the month:

Question # 4

COD of water can be measured by

Question # 5

Three elements needed for the healthy growth of plants are

Question # 6

Lanthanides an actinides belong to following group of periodic table:

Question # 7

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

Question # 8

Fresh water of total earth water is:

Question # 9

The smog having high contents of SO2is

Question # 10

BOD means

Question # 11

Components of environment is (in km) around the earth:

Question # 12

Heat balance of earth is maintained by sphere:

Question # 13

During incineration temperature range of non-rotating chamber is

Question # 14

The pH rain of acid rain is

Question # 15

Which is not an air pollutant

Question # 16

Forms of waste products:

Question # 17

The concentration of dissolved molecular oxygen in water which acts as the most important oxidizing agent ranges from

Question # 18

Increased awareness of environment issues has led chemist to develop products and processes that do not impact on the environment in terms of pollution or depletion of sources. To help chemist to achieve this aim, some principles are drawn, which one is not the guiding principle

Question # 19

Many petroleum products are:

Question # 20

Why a C- C bond breaks by uv light

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MCAT Chemistry Chapter 21 Important MCQ's

Sr.# Question Answer
1 During incineration temperature range of non-rotating chamber is
A. 900-1000C°
B. 650-1100C°
C. 950-1300C°
D. 700-900C°
2 Chlorofluorocarbons and aerosols are inert in sphere:
A. troposphere
B. stratosphere
C. lithosphere
D. hydrosphere
3 The normal amount of overhead ozone is
A. 350 DU
B. 450 DU
C. 400 DU
D. 300 DU
4 Term ozone hole is used for depletion of ozone during months of:
A. Jan-Feb
B. March - Sep
C. Sep- Nov
D. Dec-Feb
5 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
6 Soil remediation means
A. to make it suitable for cultivation of crops
B. to make it acidic
C. to make it alkeline
D. to add manure into it
7 Chemical equilibrium involving  reactants and products in more than one phase is called:
A. Homogeneous 
B. Heterogeneous 
C. Dynamic
D. Static
8 As the number of carbon atoms increase the number of isomers also increase. The six carbon compound hexane has as many as:
A. 10 isomers
B. 3 isomers
C. 5 isomers
D. 6 isomers
9 Water exist in only
A. One state
B. Two state
C. Three states
D. 4 states
10 alum or aluminium sulphate used as coagulant in alkaline medium change into precipitate of radicals of alumimium.
A. sulphates
B. oxides
C. hydroxides
D. chlorides

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