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

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Question # 1

BOD is

Question # 2

Ultraviolet radiation from sun causes a reaction that produces

Question # 3

Sulphur dioxide affects

Question # 4

Ozone hole refers to

Question # 5

Carbon monoxide is harmful to human beings as it

Question # 6

Pollution is

Question # 7

Which is not a method for solid waste management

Question # 8

Which gas is not a constituent of atmosphere

Question # 9

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

Question # 10

Burning of fossil fuels is the main source of pollution

Question # 11

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

Question # 12

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

Question # 13

B.O.D is connected with

Question # 14

Fungicides are the pesticides which

Question # 15

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 # 16

Biodegradable pollutant is

Question # 17

Minamata disease is due to pollution of

Question # 18

Which one of the following is not air pollutant gas

Question # 19

Which one is the most toxic?

Question # 20

Potable water is considered to be

Question # 21

Result of ozone hole is

Question # 22

Which is not a component of environment

Question # 23

Which heavy metals do not have any safe limits

Question # 24

Chief air pollutant which is likely to deplete ozone layer

Question # 25

Water is often treated with chlorine to

Question # 26

Which of the following forms a toxic substance in blood by combing with hemoglobin?

Question # 27

Ecosystem is a smaller unit of

Question # 28

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 # 29

Which of the following is not an air

Question # 30

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

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 In Antarctica ozone depletion is due to the formation of following compound
A. Acrolein
B. Peroxy acetyl nitrate
C. SO2and SO3
D. Chlorine nitrate
2 Air pollution is not caused by
A. Pollen grains
B. Hydroelectric power
C. Industries
D. Automobiles
3 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
4 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
5 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
6 Burning of fossil fuels is the main source of pollution
A. Nitrogen oxide
B. Nitric oxide
C. Nitrous oxide
D. Sulphur dioxide
7 Which heavy metals do not have any safe limits
A. As
B. Hg
C. Cr
D. All of these
8 Which step is unnecessary for purification of water for drinking purposes
A. Aeration
B. Coagulation
C. Treatment with chlorine
D. Treatment with iodine
9 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
10 Which one of the following dissolves more rapidly in blood hemoglobin than oxygen?
A. Ozone
B. Nitrous oxide
C. Sulphure dioxide
D. Carbon monoxide

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