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

NO and NO2gases in atmosphere are represented by

Question # 2

Chief source of water and soil pollution is

Question # 3

Which is not the condition for the formation of smog

Question # 4

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

Question # 5

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

Question # 6

Which causes water pollution?

Question # 7

The region of earth capable of supporting life is

Question # 8

Chloroflurocarbon releases a chemical harmful to ozone

Question # 9

Acid rains are produced by

Question # 10

A pollutant affects

Question # 11

SO2Makes ______ acid rains

Question # 12

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 # 13

The % of CO2is the atmosphere is

Question # 14

Which one of the following is not air pollutant gas

Question # 15

The film forming components of paints are

Question # 16

The normal amount of overhead ozone is about

Question # 17

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

Question # 18

Air pollution is not caused by

Question # 19

A single chlorine free radical can destroy how many ozone molecules

Question # 20

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

Question # 21

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

Question # 22

Pick up the correct statement

Question # 23

Drained sewage has B.O.D

Question # 24

Acid rain is due to increase in atmospheric concentration of

Question # 25

Carbon monoxide is pollutant as it

Question # 26

B.O.D is connected with

Question # 27

As it passes into food chain, the concentration of DDT

Question # 28

Polycyolic aromatic hydrocarbons are taught to be

Question # 29

When chlorofluoro carbon are subjected to U.V. they form

Question # 30

Domestic waste mostly constitutes

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 In the atmosphere, CO2is about
A. 0.01%
B. 0.03%
C. 0.05%
D. 0.09%
2 Which is not the condition for the formation of smog
A. There must be sufficient NO gas
B. There must be sunlight to help photo chemical reaction to take place
C. Air must be blowing swiftly
D. There must be SO2in the air
3 Exposure to CO results in
A. Headache
B. Fatigue
C. Unconsciousness
D. All of these
4 Water pollution is mainly due to
A. Sulphure dioxide
B. Carbon dioxide
C. Oxygen
D. Industrial discharges
5 As it passes into food chain, the concentration of DDT
A. Remains same
B. Decreases
C. Increases
D. Unpredictable
6 Chromium (VI) is highly toxic and can cause
A. Blindness
B. Cancer
C. Liver problems
D. Blood problems
7 Ozone depletion in stratosphere shall result in
A. Forest fires
B. Increased incidence of skin cancer
C. Global warming
D. None of the above
8 When rain is accompanied by a thunderstorm, the collected rain water will have a pH value
A. Uninfluenced by occurrence of thuderstorm
B. Which depends on the amount of dust in air
C. Slightly lower than that of rain water without thunderstorm
D. Slighlty higher than that when the thunderstom is not there
9 Which of the following human activities are contaminating surface and ground waters
A. Pesticides
B. Septic tanks
C. Petroleum and natural gas production
D. All of these
10 Result of ozone hole is
A. Green house effect
B. Global warming
C. Acid rain
D. UV rays reach the earth

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