ECAT Pre Engineering Chemistry Chapter 27 MCQ Test With Answer

MCQ's Test For ECAT Chemistry Chapter 27 Environmental Chemistry

Try The MCQ's Test For ECAT Chemistry Chapter 27 Environmental Chemistry

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ECAT Chemistry Chapter 27 Environmental Chemistry

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Question # 1

Ozone in most of the tropical regions acts as a pollutant and causes

Question # 2

Which gas is not a constituent of atmosphere

Question # 3

Mottling of teeth is due to presence of an element in drinking water

Question # 4

Ozone hole refers to

Question # 5

Chloroflurocarbon releases a chemical harmful to ozone

Question # 6

The toxic organic compounds and heavy metals and metalloids results in contamination of

Question # 7

Environmental pollution affects

Question # 8

Carbon monoxide, emitted by automobiles, prevents transport of oxygen in body due

Question # 9

Ground and surface waters are contaminated and become polluted due to the human activity. Which human activity will bot cause water pollution

Question # 10

BOD is

Question # 11

Oceans cove ______ percent of the surface of the earth

Question # 12

Which one is the major reason for pollution in high cities?

Question # 13

Drawback DDT as presticide is

Question # 14

Most hazardous metal pollutant of automobile exhaust is

Question # 15

In water the most important oxidizing agent is dissolved molecular oxygen which ranges from

Question # 16

Acid rain is caused when various atmospheric gases dissolve in rain water. What are the gases that cause rain water

Question # 17

Fungicides are the pesticides which

Question # 18

The region of earth capable of supporting life is

Question # 19

Any substance in the environment which adversely affects the human health and natural functioning of the Ecosystem is known as

Question # 20

SO2Makes ______ acid rains

Question # 21

Pick up the correct statement

Question # 22

A single chlorine free radical can destroy how many ozone molecules

Question # 23

As it passes into food chain, the concentration of DDT

Question # 24

Contamination of Hg comes into surface water from chlor industrial wastes. Why is Hg toxic

Question # 25

Domestic waste mostly constitutes

Question # 26

What is the cause of water pollution

Question # 27

Ozone depletion in stratosphere shall result in

Question # 28

Air pollution is not caused by

Question # 29

Depletion of ozone layer is due to

Question # 30

Acid rains are produced by

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Acid rain is due to increase in atmospheric concentration of
A. Ozone and dust
B. CO2and CO
C. SO3and CO
D. SO2and NO2
2 Ecology is a science of environment and deals specially with
A. Stratosphere
B. Biosphere
C. Lithosphere
D. Hydrosphere
3 Increased asthmatic attacks in certain seasons are related to
A. Inhalation of seasonal pollen
B. Eating of seasonal vegetables
C. Low temperature
D. Wet and dry environment
4 In water the most important oxidizing agent is dissolved molecular oxygen which ranges from
A. 2 - 4 ppm
B. 4 - 6 ppm
C. 2 - 5 ppm
D. 4 - 8 ppm
5 Minamata disease is due to pollution of
A. Organic waste into drinking water
B. Oil spill in water
C. Industrial waste containing mercury into fishing water
D. Arsenic into the atmosphere
6 DDT is
A. Biodegradable pollutant
B. Nondegradable pollutant
C. Not a pollutant
D. An antibiotic
7 Drawback DDT as presticide is
A. I becomes ineffective after some time
B. It is less effective than others
C. It is not easily/rapidly degraded in nature
D. Its high cost
8 Carbon monoxide is harmful to human beings as it
A. Is carcinogenic
B. Is antagonistic to CO2
C. Has higher affinity for hemoglobin as compared to oxygen
D. Is destructive to O3
9 Eutrophication causes reduction in
A. Dissolved hydrogen
B. Dissolved oxygen
C. Dissolved salts
D. All the above
10 Carbon monoxide is pollutant as it
A. Inactivates nerves
B. Inhibits glycolysis
C. Combines with oxygen
D. Combines with hemoglobin

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