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

The amount of oxygen in the lithosphere is about

Question # 2

Ozone hole refers to

Question # 3

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

Question # 4

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

Question # 5

Chief air pollutant which is likely to deplete ozone layer

Question # 6

Which gas is not a constituent of atmosphere

Question # 7

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

Question # 8

Carbon monoxide is pollutant as it

Question # 9

Chief source of water and soil pollution is

Question # 10

Value of chemical oxygen demand (COD) is a measure of chemically oxidizable matter in water. Which value of COD will indicate more polluted water

Question # 11

Ozone layer of stratosphere requires protection from indiscriminate use of

Question # 12

Photochemical smog is caused by

Question # 13

Chromium (VI) is highly toxic and can cause

Question # 14

BOD is

Question # 15

In purification of potable water the coagulant used is

Question # 16

Which one is the most toxic?

Question # 17

Surface and ground water sources are contaminated by various human activities. Which of the followings is not a human activity that causes contamination in fresh water

Question # 18

In Antarctica ozone depletion is due to the formation of following compound

Question # 19

Soil salinity can be measured by

Question # 20

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

Question # 21

Which factor is helping to reduce the environmental pollution

Question # 22

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

Question # 23

Which heavy metals do not have any safe limits

Question # 24

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

Question # 25

Air pollution is not caused by

Question # 26

Polycyolic aromatic hydrocarbons are taught to be

Question # 27

Water is often treated with chlorine to

Question # 28

NO and NO2gases in atmosphere are represented by

Question # 29

Drained sewage has B.O.D

Question # 30

Chlorofluorocarbon, CF2CI2, plays an effective role in removing O3(ozone) in the stratosphere. Which reaction does not cause the depletion of ozone

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 The % of CO2is the atmosphere is
A. 3.0%
B. 0.03%
C. 0.3%
D. 0.5%
2 Cyclone collector is used for minimizing
A. Radioactive pollution
B. Air pollution
C. Noise pollution
D. Water pollution
3 Chromium (VI) is highly toxic and can cause
A. Blindness
B. Cancer
C. Liver problems
D. Blood problems
4 B.O.D is connected with
A. Organic matter
B. Microbes
C. Mircrobes and organic matter
D. None of the above
5 Most hazardous metal pollutant of automobile exhaust is
A. Mercury
B. Lead
C. Cadmium
D. Copper
6 Acid rain is due to increase in atmospheric concentration of
A. Ozone and dust
B. CO2and CO
C. SO3and CO
D. SO2and NO2
7 In incinerating the waste is burnt at
A. 1000°C
B. 100°C
C. 2000°C
D. 1500°C
8 Chief source of water and soil pollution is
A. Mining
B. Thermal power plant
C. Agro-industry
D. All the above
9 Chromium (VI) is highly toxic and can cause
A. Blindness
B. Cancer
C. Liver problems
D. Blood problems
10 Environmental pollution affects
A. Biotic components
B. Plants only
C. Man only
D. Biotic and abiotic components of environment

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