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

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

Question # 2

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

Question # 3

Atomospheric pollutant is

Question # 4

Pick up the correct statement

Question # 5

DDT is

Question # 6

Exposure to CO results in

Question # 7

Chromium (VI) is highly toxic and can cause

Question # 8

Chloroflurocarbon releases a chemical harmful to ozone

Question # 9

B.O.D is connected with

Question # 10

Carbon monoxide is harmful to human beings as it

Question # 11

The toxic organic compounds and heavy metals and metalloids results in contamination of

Question # 12

In the atmosphere, O2is about

Question # 13

Air pollution is not caused by

Question # 14

SO2and NO2produce pollution by increasing

Question # 15

Soil remediation means

Question # 16

Which heavy metals do not have any safe limits

Question # 17

Water is often treated with chlorine to

Question # 18

Ozone depletion in stratosphere shall result in

Question # 19

Which causes water pollution?

Question # 20

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

Question # 21

Oceans cove ______ percent of the surface of the earth

Question # 22

The largest item which is recycled is

Question # 23

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

Question # 24

BOD is

Question # 25

Pollution is

Question # 26

The region of earth capable of supporting life is

Question # 27

Chief source of water and soil pollution is

Question # 28

Which of the following human activities are contaminating surface and ground waters

Question # 29

Ozone hole refers to

Question # 30

The % of CO2is the atmosphere is

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Which one of the following is not air pollutant gas
A. CO
B. CO2
C. NO
D. SO2
2 Eutrophication causes reduction in
A. Dissolved hydrogen
B. Dissolved oxygen
C. Dissolved salts
D. All the above
3 Phosphate pollution is caused by
A. Weathering of phosphate rocks only
B. Agricultural fertilizers
C. Phosphate rocks and sewage
D. Sewage and agricultural fertilizers
4 A single chlorine free radical can destroy how many ozone molecules
A. 100
B. 100000
C. 10000
D. 10
5 Chloroflurocarbon releases a chemical harmful to ozone
A. Fluorine
B. Chlorine
C. Nitrogen peroxide
D. Sulphure dioxdie
6 Atmosphere of big/metropolitan cities is polluted most by
A. Automobile exhausts
B. Pesticide residue
C. Household waste
D. Radio-active fall out
7 Depletion of ozone layer is due to
A. Oxides of nitrogen
B. Oxides of carbon
C. Oxides of sulphur
D. None of the above
8 Which is not a component of environment
A. Biosphere
B. Lithospahre
C. Hydrosphere
D. None of these
9 Oceans cove ______ percent of the surface of the earth
A. 60
B. 70
C. 80
D. 97
10 Burning of fossil fuels is the main source of pollution
A. Nitrogen oxide
B. Nitric oxide
C. Nitrous oxide
D. Sulphur dioxide

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