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 is not the affect of polluted air on environment

Question # 2

Chloroflurocarbon releases a chemical harmful to ozone

Question # 3

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

Question # 4

Which step is unnecessary for purification of water for drinking purposes

Question # 5

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

Question # 6

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 # 7

Biodegradable pollutant is

Question # 8

Result of ozone hole is

Question # 9

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

Question # 10

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

Question # 11

Atomospheric pollutant is

Question # 12

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

Question # 13

Drained sewage has B.O.D

Question # 14

Which of the following is not an air

Question # 15

Which of the following is responsible for depletion of the ozone layer in the upper strata of the atmosphere?

Question # 16

Burning of fossil fuels is the main source of pollution

Question # 17

Water pollution is mainly due to

Question # 18

NO and NO2gases in atmosphere are represented by

Question # 19

Eutrophication causes reduction in

Question # 20

Chief source of water and soil pollution is

Question # 21

Classical smog occurs in palces of

Question # 22

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

Question # 23

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 # 24

Atmosphere of big/metropolitan cities is polluted most by

Question # 25

B.O.D is connected with

Question # 26

Ecosystem is a smaller unit of

Question # 27

The film forming components of paints are

Question # 28

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

Question # 29

The amount of Si in the lithosphere is about

Question # 30

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

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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 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
3 The film forming components of paints are
A. Resins
B. Thinners
C. Pigments
D. Driers
4 Depletion of ozone layer is due to
A. Oxides of nitrogen
B. Oxides of carbon
C. Oxides of sulphur
D. None of the above
5 In the atmosphere, CO2is about
A. 0.01%
B. 0.03%
C. 0.05%
D. 0.09%
6 Carbon monoxide is harmful to human beings as it
A. Is carcinogenic
B. Is antagonistic to CO2
C. Has higher affinity for hemoglobin as compared to oxygen
D. Is destructive to O3
7 Chromium (VI) is highly toxic and can cause
A. Blindness
B. Cancer
C. Liver problems
D. Blood problems
8 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
9 Acid rain is caused when various atmospheric gases dissolve in rain water. What are the gases that cause rain water
A. SO2
B. NO2
C. CO
D. A and b only
10 Which one is the most toxic?
A. Carbon
B. CO
C. CO2
D. SO2

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