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

Ozone depletion in stratosphere shall result in

Question # 2

Which is not the affect of polluted air on environment

Question # 3

Ozone hole is maximum over

Question # 4

Ultraviolet radiation from sun causes a reaction that produces

Question # 5

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

Question # 6

Water pollution is mainly due to

Question # 7

Acid rains are produced by

Question # 8

Which gas is not a constituent of atmosphere

Question # 9

Oceans cove ______ percent of the surface of the earth

Question # 10

Potable water is considered to be

Question # 11

Chief air pollutant which is likely to deplete ozone layer

Question # 12

Soil remediation means

Question # 13

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

Question # 14

The % of CO2is the atmosphere is

Question # 15

Depletion of ozone layer is due to

Question # 16

The amount of oxygen in the lithosphere is about

Question # 17

Atmosphere of big/metropolitan cities is polluted most by

Question # 18

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

Question # 19

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

Question # 20

Which step is unnecessary for purification of water for drinking purposes

Question # 21

Chief source of water and soil pollution is

Question # 22

Eutrophication causes reduction in

Question # 23

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

Question # 24

Which causes water pollution?

Question # 25

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

Question # 26

Which of the following forms a toxic substance in blood by combing with hemoglobin?

Question # 27

BOD is

Question # 28

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

Question # 29

Ozone layer of stratosphere requires protection from indiscriminate use of

Question # 30

To purify water which has mud dissolved in it, A substance which coagulates the suspended particles is used. The coagulant may be

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Minamata disease is due to pollution of
A. Organic waste into drinking water
B. Oil spill in water
C. Industrial waste containing mercury into fishing water
D. Arsenic into the atmosphere
2 Water which his considered to be safe for human consumption is known as
A. Distilled water
B. Contaminated water
C. Potable water
D. Rain water
3 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
4 Acid rains are produced by
A. Excess NO2and SO2 from burining fossil fuels
B. Excess production of NH3by industry and coal gas
C. Excess release of carbon monoxide by incomplete combustion
D. Excess formation of CO2by combustion and animal respiration
5 Chief source of water and soil pollution is
A. Mining
B. Thermal power plant
C. Agro-industry
D. All the above
6 Increasing skin cancer and high mutation rate are due to
A. Acid rain
B. Ozone depletion
C. CO pollution
D. CO2Pollution
7 A pollutant affects
A. Human health
B. Quality of life
C. Functioning of ecosystem
D. All of these
8 Chief air pollutant which is likely to deplete ozone layer
A. Sulphure dioxide
B. Carbon dioxide
C. Nitrogen oxides and chloro fluorocarbons
9 Soil salinity can be measured by
A. Calorimeter
B. Potometer
C. Porometer
D. Conducitvity meter
10 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
A. Live stock waste
B. Oil leaks and spills
C. Disposal of industrial effluents
D. Rain

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