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

Carbon monoxide is harmful to human beings as it

Question # 2

Ultraviolet radiation from sun causes a reaction that produces

Question # 3

When rain is accompanied by a thunderstorm, the collected rain water will have a pH value

Question # 4

In purification of potable water the coagulant used is

Question # 5

Which is not a method for solid waste management

Question # 6

Chloroflurocarbon releases a chemical harmful to ozone

Question # 7

Environmental pollution affects

Question # 8

In the atmosphere, O2is about

Question # 9

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

Question # 10

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

Question # 11

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

Question # 12

Which heavy metals do not have any safe limits

Question # 13

Which of the following is not an air

Question # 14

A pollutant affects

Question # 15

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

Question # 16

Chief source of water and soil pollution is

Question # 17

A single chlorine free radical can destroy how many ozone molecules

Question # 18

What is the cause of water pollution

Question # 19

Drawback DDT as presticide is

Question # 20

Photochemical smog is caused by

Question # 21

The pH range of the acid rain is

Question # 22

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

Question # 23

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 # 24

NO and NO2gases in atmosphere are represented by

Question # 25

Which one is not a pollutant normally?

Question # 26

The region of earth capable of supporting life is

Question # 27

Mottling of teeth is due to presence of an element in drinking water

Question # 28

Ozone layer of stratosphere requires protection from indiscriminate use of

Question # 29

Most hazardous metal pollutant of automobile exhaust is

Question # 30

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

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 B.O.D is connected with
A. Organic matter
B. Microbes
C. Mircrobes and organic matter
D. None of the above
2 The % of CO2is the atmosphere is
A. 3.0%
B. 0.03%
C. 0.3%
D. 0.5%
3 Carbon monoxide is pollutant as it
A. Inactivates nerves
B. Inhibits glycolysis
C. Combines with oxygen
D. Combines with hemoglobin
4 Biodegradable pollutant is
A. Plastic
B. Asbestos
C. Sewage
D. Mercury
5 A single chlorine free radical can destroy how many ozone molecules
A. 100
B. 100000
C. 10000
D. 10
6 Pick up the correct statement
A. CO which is major pollutant resulting from the combustion of fuels in automobile plays a major role in photochemical smog
B. Classical smog has an oxidizing character while the phtochemical smog is reducing in character
C. Photochemical smog occurs in day time whereas the classical smog occurs in early morning hours
D. During formation of smog the level of ozone in the atmosphere goes down
7 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
8 Ecology is a science of environment and deals specially with
A. Stratosphere
B. Biosphere
C. Lithosphere
D. Hydrosphere
9 In water the most important oxidizing agent is dissolved molecular oxygen which ranges from
A. 2 - 4 ppm
B. 4 - 6 ppm
C. 2 - 5 ppm
D. 4 - 8 ppm
10 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
A. Blow air
B. Add Na2CO3
C. Use a specially made sorbent having flouring trapped in it
D. Use a sorbent having Al2O3trapped in it

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