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

Minamata disease is due to pollution of

Question # 2

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

Question # 3

Photochemical smog is caused by

Question # 4

Ozone hole refers to

Question # 5

Which step is unnecessary for purification of water for drinking purposes

Question # 6

The region of earth capable of supporting life is

Question # 7

DDT is

Question # 8

Shahi Qilla may be destroyed by

Question # 9

A pollutant affects

Question # 10

BOD is

Question # 11

What is the cause of water pollution

Question # 12

The film forming components of paints are

Question # 13

Pollution is

Question # 14

Chromium (VI) is highly toxic and can cause

Question # 15

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

Question # 16

Which causes water pollution?

Question # 17

Acid rain is due to increase in atmospheric concentration of

Question # 18

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 # 19

Which gasses are produced from landfills

Question # 20

Biodegradable pollutant is

Question # 21

Ozone layer of stratosphere requires protection from indiscriminate use of

Question # 22

In water the most important oxidizing agent is dissolved molecular oxygen which ranges from

Question # 23

Environmental pollution affects

Question # 24

Swage water is purified by

Question # 25

Soil salinity can be measured by

Question # 26

Chief source of water and soil pollution is

Question # 27

Which is not the affect of polluted air on environment

Question # 28

Atmosphere of big/metropolitan cities is polluted most by

Question # 29

Which is not the condition for the formation of smog

Question # 30

Which factor is helping to reduce the environmental pollution

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Chief source of water and soil pollution is
A. Mining
B. Thermal power plant
C. Agro-industry
D. All the above
2 Water is often treated with chlorine to
A. Increase oxygen content
B. Kill germs
C. Remove hardness
D. Remove suspended particles
3 BOD is
A. Biological oxygen deficit
B. Biosphere oxygen demand
C. Biological oxygen demand
D. None of the above
4 A single chlorine free radical can destroy how many ozone molecules
A. 100
B. 100000
C. 10000
D. 10
5 The amount of oxygen in the lithosphere is about
A. 35.50%
B. 40.60%
C. 56.60%
D. 50.50%
6 Polycyolic aromatic hydrocarbons are taught to be
A. Disinfectant
B. Carcinogenic
C. Helpful
D. Reactive
7 The pH range of the acid rain is
A. 8 - 7
B. 7 - 6.5
C. 6.5 - 6
D. Less than 5
8 Ecosystem is a smaller unit of
A. Hydrosphere
B. Lithosphere
C. Biosphere
D. Atmosphere
9 In incinerating the waste is burnt at
A. 1000°C
B. 100°C
C. 2000°C
D. 1500°C
10 Domestic waste mostly constitutes
A. Non-biodegradable pollution
B. Biodegradable pollution
C. Effluents
D. Air pollution

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