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

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

Question # 2

Environmental pollution affects

Question # 3

Which step is unnecessary for purification of water for drinking purposes

Question # 4

Air pollution is not caused by

Question # 5

Which causes water pollution?

Question # 6

Ground and surface waters are contaminated and become polluted due to the human activity. Which human activity will bot cause water pollution

Question # 7

Which gas is not a constituent of atmosphere

Question # 8

Drawback DDT as presticide is

Question # 9

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 # 10

Ozone hole is maximum over

Question # 11

Acid rain is due to increase in atmospheric concentration of

Question # 12

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

Question # 13

Ozone hole refers to

Question # 14

B.O.D is connected with

Question # 15

Which heavy metals do not have any safe limits

Question # 16

Which of the following is not an air

Question # 17

Fungicides are the pesticides which

Question # 18

Ecosystem is a smaller unit of

Question # 19

Ozone layer of stratosphere requires protection from indiscriminate use of

Question # 20

Most hazardous metal pollutant of automobile exhaust is

Question # 21

Surface and ground water sources are contaminated by various human activities. Which of the followings is not a human activity that causes contamination in fresh water

Question # 22

Which gasses are produced from landfills

Question # 23

Oceans cove ______ percent of the surface of the earth

Question # 24

Water pollution is mainly due to

Question # 25

Spraying of DDT produces pollution of

Question # 26

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

Question # 27

Chief source of water and soil pollution is

Question # 28

Pollution is

Question # 29

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

Question # 30

SO2Makes ______ acid rains

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 UV radiations bring about
A. Skin cancer
B. Mouth cancer
C. Lung cancer
D. Liver cancer
2 Chromium (VI) is highly toxic and can cause
A. Blindness
B. Cancer
C. Liver problems
D. Blood problems
3 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+
4 Chromium (VI) is highly toxic and can cause
A. Blindness
B. Cancer
C. Liver problems
D. Blood problems
5 Result of ozone hole is
A. Green house effect
B. Global warming
C. Acid rain
D. UV rays reach the earth
6 CFCs destroy ozone layer. How many ozone molecule a chlorine free radical can destroy
A. 10,000
B. 20,000
C. 100,000
D. 50,000
7 Most hazardous metal pollutant of automobile exhaust is
A. Mercury
B. Lead
C. Cadmium
D. Copper
8 Which one is the major reason for pollution in high cities?
A. Fossil fuel
B. Acid rain
C. Heat dispersion
D. None of the above
9 Pollutant of automobile exhausts that affects nervous system/produces mental diseases is
A. Mercury
B. Lead
C. Nitrogen oxide
D. Sulphuric oxide
10 Which step is unnecessary for purification of water for drinking purposes
A. Aeration
B. Coagulation
C. Treatment with chlorine
D. Treatment with iodine

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