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 one is the most toxic?

Question # 2

Air pollution is not caused by

Question # 3

As it passes into food chain, the concentration of DDT

Question # 4

The % of CO2is the atmosphere is

Question # 5

Depletion of ozone layer is due to

Question # 6

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

Question # 7

Ozone depletion in stratosphere shall result in

Question # 8

Classical smog occurs in palces of

Question # 9

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

Question # 10

Domestic waste mostly constitutes

Question # 11

Hydrocarbans, SO2, CO, NH3, nitrogen oxides and compounds of fluorine are called

Question # 12

Which is not the affect of polluted air on environment

Question # 13

SO2Makes ______ acid rains

Question # 14

Which factor is helping to reduce the environmental pollution

Question # 15

Chromium (VI) is highly toxic and can cause

Question # 16

Which causes water pollution?

Question # 17

DDT is

Question # 18

Soil remediation means

Question # 19

Biodegradable pollutant is

Question # 20

Ozone hole refers to

Question # 21

Ozone hole is maximum over

Question # 22

Ecosystem is a smaller unit of

Question # 23

BOD is

Question # 24

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

Question # 25

Which one of the following dissolves more rapidly in blood hemoglobin than oxygen?

Question # 26

Ultraviolet radiation from sun causes a reaction that produces

Question # 27

Chloroflurocarbon releases a chemical harmful to ozone

Question # 28

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 # 29

Chief air pollutant which is likely to deplete ozone layer

Question # 30

Which of the following is responsible for depletion of the ozone layer in the upper strata of the atmosphere?

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Eutrophication causes reduction in
A. Dissolved hydrogen
B. Dissolved oxygen
C. Dissolved salts
D. All the above
2 Atomospheric pollutant is
A. CO2
B. CO
C. O2
D. N2
3 Environmental pollution affects
A. Biotic components
B. Plants only
C. Man only
D. Biotic and abiotic components of environment
4 The region of earth capable of supporting life is
A. Hydrosphere
B. Lithosphere
C. Biosphere
D. Atmosphere
5 Chloroflurocarbon releases a chemical harmful to ozone
A. Fluorine
B. Chlorine
C. Nitrogen peroxide
D. Sulphure dioxdie
6 In the atmosphere, CO2is about
A. 0.01%
B. 0.03%
C. 0.05%
D. 0.09%
7 Phosphate pollution is caused by
A. Weathering of phosphate rocks only
B. Agricultural fertilizers
C. Phosphate rocks and sewage
D. Sewage and agricultural fertilizers
8 In Antarctica ozone depletion is due to the formation of following compound
A. Acrolein
B. Peroxy acetyl nitrate
C. SO2and SO3
D. Chlorine nitrate
9 Which step is unnecessary for purification of water for drinking purposes
A. Aeration
B. Coagulation
C. Treatment with chlorine
D. Treatment with iodine
10 Which of the following is responsible for depletion of the ozone layer in the upper strata of the atmosphere?
A. Fullerences
B. Freons
C. Polyhalogens
D. Ferrocene

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