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

What is the cause of water pollution

Question # 2

Soil remediation means

Question # 3

DDT is

Question # 4

Which one is the most toxic?

Question # 5

Exposure to CO results in

Question # 6

Air pollution is not caused by

Question # 7

Domestic waste mostly constitutes

Question # 8

Drained sewage has B.O.D

Question # 9

Spraying of DDT produces pollution of

Question # 10

A single chlorine free radical can destroy how many ozone molecules

Question # 11

Soil salinity can be measured by

Question # 12

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

Question # 13

Sulphur dioxide affects

Question # 14

Increased asthmatic attacks in certain seasons are related to

Question # 15

Acid rain is due to increase in atmospheric concentration of

Question # 16

SO2Makes ______ acid rains

Question # 17

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

Question # 18

Water which his considered to be safe for human consumption is known as

Question # 19

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

Question # 20

Which is not the condition for the formation of smog

Question # 21

Ecology is a science of environment and deals specially with

Question # 22

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

Question # 23

Which causes water pollution?

Question # 24

Swage water is purified by

Question # 25

Minamata disease is due to pollution of

Question # 26

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

Question # 27

Ecosystem is a smaller unit of

Question # 28

Water pollution is mainly due to

Question # 29

B.O.D is connected with

Question # 30

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

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Classical smog occurs in palces of
A. Excess SO2
B. Low temperature
C. High temperature
D. Excess NH3
2 In Antarctica ozone depletion is due to the formation of following compound
A. Acrolein
B. Peroxy acetyl nitrate
C. SO2and SO3
D. Chlorine nitrate
3 Chromium (VI) is highly toxic and can cause
A. Blindness
B. Cancer
C. Liver problems
D. Blood problems
4 Which gas is not a constituent of atmosphere
A. Xe
B. O3
C. H2
D. F2
5 BOD is
A. Biological oxygen deficit
B. Biosphere oxygen demand
C. Biological oxygen demand
D. None of the above
6 The normal amount of overhead ozone is about
A. 250 Du
B. 300 DU
C. 350 DU
D. 400 DU
7 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
8 Oceans cove ______ percent of the surface of the earth
A. 60
B. 70
C. 80
D. 97
9 Value of chemical oxygen demand (COD) is a measure of chemically oxidizable matter in water. Which value of COD will indicate more polluted water
A. Low value
B. Higher value
C. Both values
D. None of these
10 The amount of Si in the lithosphere is about
A. 27.72%
B. 30.35%
C. 35.30%
D. 40.21%

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