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

Ozone layer of stratosphere requires protection from indiscriminate use of

Question # 2

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

Question # 3

Chief air pollutant which is likely to deplete ozone layer

Question # 4

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

Question # 5

Exposure to CO results in

Question # 6

Swage water is purified by

Question # 7

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

Question # 8

Which is not a component of environment

Question # 9

Which step is unnecessary for purification of water for drinking purposes

Question # 10

Carbon monoxide is pollutant as it

Question # 11

Most hazardous metal pollutant of automobile exhaust is

Question # 12

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

Question # 13

Ultraviolet radiation from sun causes a reaction that produces

Question # 14

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

Question # 15

Chromium (VI) is highly toxic and can cause

Question # 16

Ozone in most of the tropical regions acts as a pollutant and causes

Question # 17

Minamata disease is due to pollution of

Question # 18

The film forming components of paints are

Question # 19

Chief source of water and soil pollution is

Question # 20

Drawback DDT as presticide is

Question # 21

Water is often treated with chlorine to

Question # 22

In incinerating the waste is burnt at

Question # 23

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

Question # 24

The amount of oxygen in the lithosphere is about

Question # 25

Which one is the most toxic?

Question # 26

A single chlorine free radical can destroy how many ozone molecules

Question # 27

Which one is not a pollutant normally?

Question # 28

Potable water is considered to be

Question # 29

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

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 The normal amount of overhead ozone is about
A. 250 Du
B. 300 DU
C. 350 DU
D. 400 DU
2 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
3 Chief air pollutant which is likely to deplete ozone layer
A. Sulphure dioxide
B. Carbon dioxide
C. Nitrogen oxides and chloro fluorocarbons
4 The pH range of the acid rain is
A. 8 - 7
B. 7 - 6.5
C. 6.5 - 6
D. Less than 5
5 Which factor is helping to reduce the environmental pollution
A. Rapid growth of population
B. Urbanization
C. Industrialization
D. Increase of plantation
6 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
A. Iodine
B. Bromine
C. Lead
D. Carbon
7 BOD is
A. Biological oxygen deficit
B. Biosphere oxygen demand
C. Biological oxygen demand
D. None of the above
8 Ozone depletion in stratosphere shall result in
A. Forest fires
B. Increased incidence of skin cancer
C. Global warming
D. None of the above
9 DDT is
A. Biodegradable pollutant
B. Nondegradable pollutant
C. Not a pollutant
D. An antibiotic
10 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

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