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

Ecosystem is a smaller unit of

Question # 2

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

Question # 3

BOD is

Question # 4

NO and NO2gases in atmosphere are represented by

Question # 5

Phosphate pollution is caused by

Question # 6

Chloroflurocarbon releases a chemical harmful to ozone

Question # 7

Pick up the correct statement

Question # 8

In incinerating the waste is burnt at

Question # 9

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

Question # 10

Chromium (VI) is highly toxic and can cause

Question # 11

Oceans cove ______ percent of the surface of the earth

Question # 12

Which heavy metals do not have any safe limits

Question # 13

Ozone hole refers to

Question # 14

Atmosphere of big/metropolitan cities is polluted most by

Question # 15

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

Question # 16

The 95.5% mass of Lithosphone is made of 11 elements i.e. O2, Si, Al, Fe, Ca, Na, K, Mg, Ti, H2and P. which element is present in trace amount

Question # 17

Which gas is not a constituent of atmosphere

Question # 18

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

Question # 19

Carbon monoxide is pollutant as it

Question # 20

Which is not a component of environment

Question # 21

Domestic waste mostly constitutes

Question # 22

Sulphur dioxide affects

Question # 23

The region of earth capable of supporting life is

Question # 24

Polycyolic aromatic hydrocarbons are taught to be

Question # 25

Ultraviolet radiation from sun causes a reaction that produces

Question # 26

Air pollution is not caused by

Question # 27

In the atmosphere, O2is about

Question # 28

Which is not the affect of polluted air on environment

Question # 29

Which causes water pollution?

Question # 30

As it passes into food chain, the concentration of DDT

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Ozone hole refers to
A. Hole in ozone layers
B. Reduction in thickness of ozone layer in stratosphere
C. Reduction of thickness of ozone in troposphere
D. Increase concentration of ozone
2 Which one of the following dissolves more rapidly in blood hemoglobin than oxygen?
A. Ozone
B. Nitrous oxide
C. Sulphure dioxide
D. Carbon monoxide
3 Which is not the affect of polluted air on environment
A. Acid rain
B. Smog
C. Ozone
D. Global warming
4 To purify water which has mud dissolved in it, A substance which coagulates the suspended particles is used. The coagulant may be
A. Ag+
B. Cu2+
C. Al3+
D. Si4+
5 Ecosystem is a smaller unit of
A. Hydrosphere
B. Lithosphere
C. Biosphere
D. Atmosphere
6 The pH range of the acid rain is
A. 8 - 7
B. 7 - 6.5
C. 6.5 - 6
D. Less than 5
7 Result of ozone hole is
A. Green house effect
B. Global warming
C. Acid rain
D. UV rays reach the earth
8 Phosphate pollution is caused by
A. Weathering of phosphate rocks only
B. Agricultural fertilizers
C. Phosphate rocks and sewage
D. Sewage and agricultural fertilizers
9 Increasing skin cancer and high mutation rate are due to
A. Acid rain
B. Ozone depletion
C. CO pollution
D. CO2Pollution
10 Atomospheric pollutant is
A. CO2
B. CO
C. O2
D. N2

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