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 gasses are produced from landfills

Question # 2

Burning of fossil fuels is the main source of pollution

Question # 3

Shahi Qilla may be destroyed by

Question # 4

Most hazardous metal pollutant of automobile exhaust is

Question # 5

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 # 6

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

Question # 7

Which is not the affect of polluted air on environment

Question # 8

Ecosystem is a smaller unit of

Question # 9

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

Question # 10

A single chlorine free radical can destroy how many ozone molecules

Question # 11

Atomospheric pollutant is

Question # 12

Drawback DDT as presticide is

Question # 13

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

Question # 14

Sulphur dioxide affects

Question # 15

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

Question # 16

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

Question # 17

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

Question # 18

Contamination of Hg comes into surface water from chlor industrial wastes. Why is Hg toxic

Question # 19

Which heavy metals do not have any safe limits

Question # 20

Which is not a component of environment

Question # 21

Environmental pollution affects

Question # 22

Which one of the following dissolves more rapidly in blood hemoglobin than oxygen?

Question # 23

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

Question # 24

Chief air pollutant which is likely to deplete ozone layer

Question # 25

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

Question # 26

Which one is the most toxic?

Question # 27

Pollution is

Question # 28

Water pollution is mainly due to

Question # 29

Ultraviolet radiation from sun causes a reaction that produces

Question # 30

BOD is

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Photochemical smog is caused by
A. CO
B. CO2
C. O3
D. NO2
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 What is the cause of water pollution
A. Chemical and bacterial contents in live stock
B. The spilled oil in rivers and ponds
C. Wide spread use of pesticides
D. All of the above
4 When chlorofluoro carbon are subjected to U.V. they form
A. Cations
B. Anions
C. Free radicals
D. None of these
5 Exposure to CO results in
A. Headache
B. Fatigue
C. Unconsciousness
D. All of these
6 Which heavy metals do not have any safe limits
A. As
B. Hg
C. Cr
D. All of these
7 Which one of the following is not air pollutant gas
A. CO
B. CO2
C. NO
D. SO2
8 Fungicides are the pesticides which
A. Control the growth of fungus
B. Kill insects
C. Kill plants
D. Kill herbs
9 Chlorofluorocarbon, CF2CI2, plays an effective role in removing O3(ozone) in the stratosphere. Which reaction does not cause the depletion of ozone
10 The film forming components of paints are
A. Resins
B. Thinners
C. Pigments
D. Driers

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