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

A pollutant affects

Question # 2

Domestic waste mostly constitutes

Question # 3

Depletion of ozone layer is due to

Question # 4

Which factor is helping to reduce the environmental pollution

Question # 5

The amount of oxygen in the lithosphere is about

Question # 6

Which is not a component of environment

Question # 7

Soil salinity can be measured by

Question # 8

Pick up the correct statement

Question # 9

The % of CO2is the atmosphere is

Question # 10

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

Question # 11

Eutrophication causes reduction in

Question # 12

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

Question # 13

Shahi Qilla may be destroyed by

Question # 14

BOD is

Question # 15

Which one is the most toxic?

Question # 16

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

Question # 17

Water is often treated with chlorine to

Question # 18

Acid rains are produced by

Question # 19

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

Question # 20

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

Question # 21

DDT is

Question # 22

Which one is not a pollutant normally?

Question # 23

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

Question # 24

As it passes into food chain, the concentration of DDT

Question # 25

Atomospheric pollutant is

Question # 26

Which one of the following is not air pollutant gas

Question # 27

Ozone layer of stratosphere requires protection from indiscriminate use of

Question # 28

Pollution is

Question # 29

The region of earth capable of supporting life is

Question # 30

Chlorofluorocarbon, CF2CI2, plays an effective role in removing O3(ozone) in the stratosphere. Which reaction does not cause the depletion of ozone

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Chief air pollutant which is likely to deplete ozone layer
A. Sulphure dioxide
B. Carbon dioxide
C. Nitrogen oxides and chloro fluorocarbons
2 SO2and NO2produce pollution by increasing
A. Alkalinity
B. Acidity
C. Neutrality
D. Buffer action
3 Spraying of DDT produces pollution of
A. Air
B. Air and water
C. Air and soil
D. Air, water and soil
4 Hydrocarbans, SO2, CO, NH3, nitrogen oxides and compounds of fluorine are called
A. Primary pollutant
B. Secondary pollutant
C. Tertiary pollutant
D. None of these
5 One of the environmental problem is the formation of oil slicks when oil is spilled from tankers in sea water. Which treatment is suitable to remove oil slicks
A. Blow air
B. Add Na2CO3
C. Use a specially made sorbent having flouring trapped in it
D. Use a sorbent having Al2O3trapped in it
6 Chromium (VI) is highly toxic and can cause
A. Blindness
B. Cancer
C. Liver problems
D. Blood problems
7 Acid rain is caused when various atmospheric gases dissolve in rain water. What are the gases that cause rain water
A. SO2
B. NO2
C. CO
D. A and b only
8 Ozone hole is maximum over
A. Europe
B. Antarctica
C. Asia
D. Africa
9 The pH of the rain water in areas where acid rain is the cause of pollution may be
A. 6.5
B. 5.6
C. 4.5
D. 2.2
10 Drawback DDT as presticide is
A. I becomes ineffective after some time
B. It is less effective than others
C. It is not easily/rapidly degraded in nature
D. Its high cost

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