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

Which causes water pollution?

Question # 2

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

Question # 3

Pollution is

Question # 4

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

Question # 5

The region of earth capable of supporting life is

Question # 6

As it passes into food chain, the concentration of DDT

Question # 7

Which one is not a pollutant normally?

Question # 8

Acid rain is due to increase in atmospheric concentration of

Question # 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

Question # 10

Water pollution is mainly due to

Question # 11

Which gas is not a constituent of atmosphere

Question # 12

NO and NO2gases in atmosphere are represented by

Question # 13

Ecology is a science of environment and deals specially with

Question # 14

Pick up the correct statement

Question # 15

In incinerating the waste is burnt at

Question # 16

Atmosphere of big/metropolitan cities is polluted most by

Question # 17

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

Question # 18

Soil salinity can be measured by

Question # 19

Drawback DDT as presticide is

Question # 20

The amount of Si in the lithosphere is about

Question # 21

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

Question # 22

Eutrophication causes reduction in

Question # 23

Cyclone collector is used for minimizing

Question # 24

Which heavy metals do not have any safe limits

Question # 25

Air pollution is not caused by

Question # 26

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

Question # 27

Burning of fossil fuels is the main source of pollution

Question # 28

Ozone hole is maximum over

Question # 29

Ultraviolet radiation from sun causes a reaction that produces

Question # 30

Chief source of water and soil pollution is

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 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
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 Air pollution is not caused by
A. Pollen grains
B. Hydroelectric power
C. Industries
D. Automobiles
4 The normal amount of overhead ozone is about
A. 250 Du
B. 300 DU
C. 350 DU
D. 400 DU
5 SO2and NO2produce pollution by increasing
A. Alkalinity
B. Acidity
C. Neutrality
D. Buffer action
6 Which gasses are produced from landfills
A. NH3
B. H2S
C. N2
D. All of these
7 Oceans cove ______ percent of the surface of the earth
A. 60
B. 70
C. 80
D. 97
8 Which one is not a pollutant normally?
A. Hydrocarbons
B. Carbon dioxide
C. Carbon monoxide
D. Sulphur dioxide
9 In the atmosphere, O2is about
A. 10%
B. 15%
C. 21%
D. 25%
10 Increasing skin cancer and high mutation rate are due to
A. Acid rain
B. Ozone depletion
C. CO pollution
D. CO2Pollution

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