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 step is unnecessary for purification of water for drinking purposes

Question # 2

Water is often treated with chlorine to

Question # 3

Which gas is not a constituent of atmosphere

Question # 4

The film forming components of paints are

Question # 5

SO2and NO2produce pollution by increasing

Question # 6

In the atmosphere, CO2is about

Question # 7

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

Question # 8

Classical smog occurs in palces of

Question # 9

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

Question # 10

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

Question # 11

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

Question # 12

Which one is the major reason for pollution in high cities?

Question # 13

Which one is not a pollutant normally?

Question # 14

Water pollution is mainly due to

Question # 15

Phosphate pollution is caused by

Question # 16

A single chlorine free radical can destroy how many ozone molecules

Question # 17

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

Question # 18

In the atmosphere, O2is about

Question # 19

Which one of the following is not air pollutant gas

Question # 20

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

Question # 21

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 # 22

SO2Makes ______ acid rains

Question # 23

Chloroflurocarbon releases a chemical harmful to ozone

Question # 24

The amount of oxygen in the lithosphere is about

Question # 25

Minamata disease is due to pollution of

Question # 26

Pick up the correct statement

Question # 27

Drawback DDT as presticide is

Question # 28

Pollutant of automobile exhausts that affects nervous system/produces mental diseases is

Question # 29

In incinerating the waste is burnt at

Question # 30

Fungicides are the pesticides which

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Contamination of Hg comes into surface water from chlor industrial wastes. Why is Hg toxic
A. It attaches to sulphur of the disulphide link
B. Hg is a heavy metal
C. Hg is liquid at room temperature
D. Hg is non reactive chemically
2 In water the most important oxidizing agent is dissolved molecular oxygen which ranges from
A. 2 - 4 ppm
B. 4 - 6 ppm
C. 2 - 5 ppm
D. 4 - 8 ppm
3 Chromium (VI) is highly toxic and can cause
A. Blindness
B. Cancer
C. Liver problems
D. Blood problems
4 Ozone hole refers to
A. Hole in ozone layers
B. Reduction in thickness of ozone layer in stratosphere
C. Reduction of thickness of ozone in troposphere
D. Increase concentration of ozone
5 A pollutant affects
A. Human health
B. Quality of life
C. Functioning of ecosystem
D. All of these
6 Which heavy metals do not have any safe limits
A. As
B. Hg
C. Cr
D. All of these
7 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
8 Pollutant of automobile exhausts that affects nervous system/produces mental diseases is
A. Mercury
B. Lead
C. Nitrogen oxide
D. Sulphuric oxide
9 Which is not the affect of polluted air on environment
A. Acid rain
B. Smog
C. Ozone
D. Global warming
10 Oceans cove ______ percent of the surface of the earth
A. 60
B. 70
C. 80
D. 97

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