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

Carbon monoxide is pollutant as it

Question # 2

Photochemical smog is caused by

Question # 3

Increasing skin cancer and high mutation rate are due to

Question # 4

In Antarctica ozone depletion is due to the formation of following compound

Question # 5

Burning of fossil fuels is the main source of pollution

Question # 6

Ultraviolet radiation from sun causes a reaction that produces

Question # 7

Acid rain is caused when various atmospheric gases dissolve in rain water. What are the gases that cause rain water

Question # 8

Pollution is

Question # 9

Minamata disease is due to pollution of

Question # 10

Acid rain is due to increase in atmospheric concentration of

Question # 11

In the atmosphere, CO2is about

Question # 12

BOD is

Question # 13

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 # 14

UV radiations bring about

Question # 15

Ozone layer of stratosphere requires protection from indiscriminate use of

Question # 16

Classical smog occurs in palces of

Question # 17

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

Question # 18

Which of the following is not an air

Question # 19

Ozone hole is maximum over

Question # 20

Chief source of water and soil pollution is

Question # 21

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 # 22

Which is not a method for solid waste management

Question # 23

As it passes into food chain, the concentration of DDT

Question # 24

In purification of potable water the coagulant used is

Question # 25

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

Question # 26

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

Question # 27

Most hazardous metal pollutant of automobile exhaust is

Question # 28

NO and NO2gases in atmosphere are represented by

Question # 29

Which one of the following is not air pollutant gas

Question # 30

Which of the following waste material is not recycled for use again

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Drawback DDT as presticide is
A. I becomes ineffective after some time
B. It is less effective than others
C. It is not easily/rapidly degraded in nature
D. Its high cost
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 The amount of Si in the lithosphere is about
A. 27.72%
B. 30.35%
C. 35.30%
D. 40.21%
4 Ecosystem is a smaller unit of
A. Hydrosphere
B. Lithosphere
C. Biosphere
D. Atmosphere
5 Biodegradable pollutant is
A. Plastic
B. Asbestos
C. Sewage
D. Mercury
6 B.O.D is connected with
A. Organic matter
B. Microbes
C. Mircrobes and organic matter
D. None of the above
7 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
8 Water pollution is mainly due to
A. Sulphure dioxide
B. Carbon dioxide
C. Oxygen
D. Industrial discharges
9 The pH range of the acid rain is
A. 8 - 7
B. 7 - 6.5
C. 6.5 - 6
D. Less than 5
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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