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

Result of ozone hole is

Question # 2

The amount of oxygen in the lithosphere is about

Question # 3

Chief air pollutant which is likely to deplete ozone layer

Question # 4

Pollution is

Question # 5

Chromium (VI) is highly toxic and can cause

Question # 6

Increasing skin cancer and high mutation rate are due to

Question # 7

Pollutant of automobile exhausts that affects nervous system/produces mental diseases is

Question # 8

Eutrophication causes reduction in

Question # 9

Shahi Qilla may be destroyed by

Question # 10

Pick up the correct statement

Question # 11

Ultraviolet radiation from sun causes a reaction that produces

Question # 12

Drained sewage has B.O.D

Question # 13

Which gasses are produced from landfills

Question # 14

Which is not the affect of polluted air on environment

Question # 15

The pH of the rain water in areas where acid rain is the cause of pollution may be

Question # 16

Which step is unnecessary for purification of water for drinking purposes

Question # 17

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

Question # 18

Increased asthmatic attacks in certain seasons are related to

Question # 19

The % of CO2is the atmosphere is

Question # 20

Which factor is helping to reduce the environmental pollution

Question # 21

Which is not a component of environment

Question # 22

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

Question # 23

Ozone layer of stratosphere requires protection from indiscriminate use of

Question # 24

Biodegradable pollutant is

Question # 25

What is the cause of water pollution

Question # 26

In purification of potable water the coagulant used is

Question # 27

Chloroflurocarbon releases a chemical harmful to ozone

Question # 28

The film forming components of paints are

Question # 29

In the atmosphere, CO2is about

Question # 30

Which heavy metals do not have any safe limits

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 When rain is accompanied by a thunderstorm, the collected rain water will have a pH value
A. Uninfluenced by occurrence of thuderstorm
B. Which depends on the amount of dust in air
C. Slightly lower than that of rain water without thunderstorm
D. Slighlty higher than that when the thunderstom is not there
2 Carbon monoxide, emitted by automobiles, prevents transport of oxygen in body due
A. Combining with oxygen to form carbon dioxide
B. Destruction of hemoglobin
C. Preventing reaction between oxygen and hemoglobin
D. Forming stable compound with hemoglobin
3 The amount of Si in the lithosphere is about
A. 27.72%
B. 30.35%
C. 35.30%
D. 40.21%
4 Environmental pollution affects
A. Biotic components
B. Plants only
C. Man only
D. Biotic and abiotic components of environment
5 The normal amount of overhead ozone is about
A. 250 Du
B. 300 DU
C. 350 DU
D. 400 DU
6 Any substance in the environment which adversely affects the human health and natural functioning of the Ecosystem is known as
A. Environment
B. Hydrosphere
C. Pollutant
D. Biosphere
7 Which gas is not a constituent of atmosphere
A. Xe
B. O3
C. H2
D. F2
8 Chief source of water and soil pollution is
A. Mining
B. Thermal power plant
C. Agro-industry
D. All the above
9 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
10 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
A. Live stock waste
B. Oil leaks and spills
C. Disposal of industrial effluents
D. Rain

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