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

The layer of earth around the earth is called:

Question # 2

Men residence time of methane in atmosphere in years is:

Question # 3

Ozone layer is

Question # 4

The smog having high contents of SO2is

Question # 5

Synthetic organic pesticides formulated nowadays are more then:

Question # 6

Heat balance of earth is maintained by sphere:

Question # 7

Rigid rocky crust earth upto a depth of 100 km is called:

Question # 8

Region of earth capable of supporting life is called:

Question # 9

What change in plants indicates toxic effect of SO2

Question # 10

Detergents are surfactants and they reduce the

Question # 11

Soil remediation means

Question # 12

Polar ice caps and glaciers consists total earth water:

Question # 13

The layer of gases around the earth are called?

Question # 14

a hole used to dump the municipal wastes is called:

Question # 15

How can heavy metal contamination like the presence of Hg or Pb may be removed from the soil

Question # 16

The reason of acid rains is

Question # 17

Why a C - Cl bond breaks by uv light

Question # 18

Forms of waste products:

Question # 19

Chemicals used to kill pests are:

Question # 20

Exhaust fumes of cars contain which poisonous gas

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MCAT Class Chemistry Chapter 21 Important MCQ's

Sr.# Question Answer
1 A single chloride free radical of CFCs can destroy upto ozone molecules:
A. 10
B. 100
C. 1000
D. 100000
2 Heat balance of earth is maintained by
A. Atmosphere
B. Hydrosphere
C. Lithosphere
D. Stratosphere
3 The pH range of the acid rain is
A. 7 - 6.5
B. 6.5 - 6
C. 6 - 5.6
D. Less than 5
4 Photo chemical smog contains ______ as main reactants
A. Nitrons oxide and unburnt hydrocarbons
B. Nilric oxide and unburnt hydrocarbons
C. No and burnt hydrocarbons
D. N2O and burnt hydrocarbons
5 Sulphate aerosols cause severe respiratory problems particularly among
A. Infants
B. Women
C. Young people
D. Old people
6 Ozone is most of the tropical regions acts as a pollutant and causes
A. Damages to eyes
B. Aggravates asthma
C. Chest discomfort
D. All of these
7 The rigid rocky part of earth crust called lithosphere extends upto a depth of:
A. 10 km
B. 100 km
C. 1000 km
D. 1500 km
8 The layer of gases around the earth are called?
A. Atmosphere
B. Hydrosphere
C. Lithosphere
D. All of these
9 Unit of ozone is?
A. Debye
B. Dobson
C. Esu
D. Coulumb
10 Ph of unpolluted rain water is
A. 07
B. Less than 6
C. 5.6
D. Less than 5

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