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 one is the most toxic?

Question # 2

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

Question # 3

Which factor is helping to reduce the environmental pollution

Question # 4

Carbon monoxide is pollutant as it

Question # 5

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

Question # 6

A pollutant affects

Question # 7

Which gas is not a constituent of atmosphere

Question # 8

Photochemical smog is caused by

Question # 9

Shahi Qilla may be destroyed by

Question # 10

Water pollution is mainly due to

Question # 11

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

Question # 12

Chief air pollutant which is likely to deplete ozone layer

Question # 13

Value of chemical oxygen demand (COD) is a measure of chemically oxidizable matter in water. Which value of COD will indicate more polluted water

Question # 14

Burning of fossil fuels is the main source of pollution

Question # 15

A single chlorine free radical can destroy how many ozone molecules

Question # 16

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

Question # 17

Drawback DDT as presticide is

Question # 18

BOD is

Question # 19

B.O.D is connected with

Question # 20

The % of CO2is the atmosphere is

Question # 21

Pollution is

Question # 22

Which of the following is not an air

Question # 23

Acid rains are produced by

Question # 24

When chlorofluoro carbon are subjected to U.V. they form

Question # 25

Chromium (VI) is highly toxic and can cause

Question # 26

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

Question # 27

In incinerating the waste is burnt at

Question # 28

Which one of the following is not air pollutant gas

Question # 29

As it passes into food chain, the concentration of DDT

Question # 30

The normal amount of overhead ozone is about

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 In purification of potable water the coagulant used is
A. Nickle sulpahte
B. Copper sulpahte
C. Barium sulpahte
D. Alum
2 Shahi Qilla may be destroyed by
A. Flood in Ravi
B. Temperature mediated spoilage of marble
C. Air pollutants from Lahore chemical industries
D. All the above
3 Value of chemical oxygen demand (COD) is a measure of chemically oxidizable matter in water. Which value of COD will indicate more polluted water
A. Low value
B. Higher value
C. Both values
D. None of these
4 BOD is
A. Biological oxygen deficit
B. Biosphere oxygen demand
C. Biological oxygen demand
D. None of the above
5 DDT is
A. Biodegradable pollutant
B. Nondegradable pollutant
C. Not a pollutant
D. An antibiotic
6 Phosphate pollution is caused by
A. Weathering of phosphate rocks only
B. Agricultural fertilizers
C. Phosphate rocks and sewage
D. Sewage and agricultural fertilizers
7 The region of earth capable of supporting life is
A. Hydrosphere
B. Lithosphere
C. Biosphere
D. Atmosphere
8 Pollutant of automobile exhausts that affects nervous system/produces mental diseases is
A. Mercury
B. Lead
C. Nitrogen oxide
D. Sulphuric oxide
9 Environmental pollution affects
A. Biotic components
B. Plants only
C. Man only
D. Biotic and abiotic components of environment
10 Chloroflurocarbon releases a chemical harmful to ozone
A. Fluorine
B. Chlorine
C. Nitrogen peroxide
D. Sulphure dioxdie

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