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

The region of earth capable of supporting life is

Question # 2

Chief air pollutant which is likely to deplete ozone layer

Question # 3

Water is often treated with chlorine to

Question # 4

Ozone depletion in stratosphere shall result in

Question # 5

Phosphate pollution is caused by

Question # 6

As it passes into food chain, the concentration of DDT

Question # 7

Which is not a component of environment

Question # 8

Fungicides are the pesticides which

Question # 9

Ozone layer of stratosphere requires protection from indiscriminate use of

Question # 10

Atmosphere of big/metropolitan cities is polluted most by

Question # 11

Water pollution is mainly due to

Question # 12

NO and NO2gases in atmosphere are represented by

Question # 13

Eutrophication causes reduction in

Question # 14

What is the cause of water pollution

Question # 15

Classical smog occurs in palces of

Question # 16

Ozone hole refers to

Question # 17

Acid rain is due to increase in atmospheric concentration of

Question # 18

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

Question # 19

The pH range of the acid rain is

Question # 20

Which is not the condition for the formation of smog

Question # 21

Most hazardous metal pollutant of automobile exhaust is

Question # 22

Which is not the affect of polluted air on environment

Question # 23

B.O.D is connected with

Question # 24

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

Question # 25

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

Question # 26

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

Question # 27

In the atmosphere, O2is about

Question # 28

The amount of Si in the lithosphere is about

Question # 29

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

Question # 30

Swage water is purified by

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Polycyolic aromatic hydrocarbons are taught to be
A. Disinfectant
B. Carcinogenic
C. Helpful
D. Reactive
2 When chlorofluoro carbon are subjected to U.V. they form
A. Cations
B. Anions
C. Free radicals
D. None of these
3 Pick up the correct statement
A. CO which is major pollutant resulting from the combustion of fuels in automobile plays a major role in photochemical smog
B. Classical smog has an oxidizing character while the phtochemical smog is reducing in character
C. Photochemical smog occurs in day time whereas the classical smog occurs in early morning hours
D. During formation of smog the level of ozone in the atmosphere goes down
4 Which one is not a pollutant normally?
A. Hydrocarbons
B. Carbon dioxide
C. Carbon monoxide
D. Sulphur dioxide
5 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
6 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
7 Water is often treated with chlorine to
A. Increase oxygen content
B. Kill germs
C. Remove hardness
D. Remove suspended particles
8 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
9 The toxic organic compounds and heavy metals and metalloids results in contamination of
A. Surface water
B. Ground water
C. Both surface and ground water
D. Neither surface nor ground waters
10 Ozone depletion in stratosphere shall result in
A. Forest fires
B. Increased incidence of skin cancer
C. Global warming
D. None of the above

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