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

00:00
Question # 1

Domestic waste mostly constitutes

Question # 2

Ultraviolet radiation from sun causes a reaction that produces

Question # 3

In the atmosphere, O2is about

Question # 4

Which causes water pollution?

Question # 5

Ozone layer of stratosphere requires protection from indiscriminate use of

Question # 6

The pH range of the acid rain is

Question # 7

Potable water is considered to be

Question # 8

Drawback DDT as presticide is

Question # 9

Ecosystem is a smaller unit of

Question # 10

Which one is the most toxic?

Question # 11

To purify water which has mud dissolved in it, A substance which coagulates the suspended particles is used. The coagulant may be

Question # 12

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

Question # 13

Air pollution is not caused by

Question # 14

In incinerating the waste is burnt at

Question # 15

Which one of the following is not air pollutant gas

Question # 16

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

Question # 17

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 # 18

When rain is accompanied by a thunderstorm, the collected rain water will have a pH value

Question # 19

UV radiations bring about

Question # 20

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

Question # 21

Oceans cove ______ percent of the surface of the earth

Question # 22

Burning of fossil fuels is the main source of pollution

Question # 23

Acid rains are produced by

Question # 24

Which is not the affect of polluted air on environment

Question # 25

Chloroflurocarbon releases a chemical harmful to ozone

Question # 26

CFCs destroy ozone layer. How many ozone molecule a chlorine free radical can destroy

Question # 27

The normal amount of overhead ozone is about

Question # 28

Which is not a component of environment

Question # 29

The film forming components of paints are

Question # 30

A single chlorine free radical can destroy how many ozone molecules

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 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
2 Cyclone collector is used for minimizing
A. Radioactive pollution
B. Air pollution
C. Noise pollution
D. Water pollution
3 Ecosystem is a smaller unit of
A. Hydrosphere
B. Lithosphere
C. Biosphere
D. Atmosphere
4 Domestic waste mostly constitutes
A. Non-biodegradable pollution
B. Biodegradable pollution
C. Effluents
D. Air pollution
5 Photochemical smog is caused by
A. CO
B. CO2
C. O3
D. NO2
6 Biodegradable pollutant is
A. Plastic
B. Asbestos
C. Sewage
D. Mercury
7 Which one is not a pollutant normally?
A. Hydrocarbons
B. Carbon dioxide
C. Carbon monoxide
D. Sulphur dioxide
8 Which one of the following is not air pollutant gas
A. CO
B. CO2
C. NO
D. SO2
9 In the atmosphere, O2is about
A. 10%
B. 15%
C. 21%
D. 25%
10 Atomospheric pollutant is
A. CO2
B. CO
C. O2
D. N2

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