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

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

Question # 2

Burning of fossil fuels is the main source of pollution

Question # 3

Water pollution is mainly due to

Question # 4

SO2and NO2produce pollution by increasing

Question # 5

Chief air pollutant which is likely to deplete ozone layer

Question # 6

Which one is the most toxic?

Question # 7

Industrial effuents have toxic synthetic organic compounds as well as heavy metals like

Question # 8

The region of earth capable of supporting life is

Question # 9

Shahi Qilla may be destroyed by

Question # 10

Which step is unnecessary for purification of water for drinking purposes

Question # 11

Atmosphere of big/metropolitan cities is polluted most by

Question # 12

The amount of Si in the lithosphere is about

Question # 13

Which factor is helping to reduce the environmental pollution

Question # 14

The % of CO2is the atmosphere is

Question # 15

Which causes water pollution?

Question # 16

DDT is

Question # 17

Potable water is considered to be

Question # 18

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

Question # 19

Soil salinity can be measured by

Question # 20

Increased asthmatic attacks in certain seasons are related to

Question # 21

Ozone hole refers to

Question # 22

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

Question # 23

A pollutant affects

Question # 24

Environmental pollution affects

Question # 25

Which one of the following is not air pollutant gas

Question # 26

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

Question # 27

In the atmosphere, O2is about

Question # 28

Carbon monoxide is harmful to human beings as it

Question # 29

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

Question # 30

Eutrophication causes reduction in

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 UV radiations bring about
A. Skin cancer
B. Mouth cancer
C. Lung cancer
D. Liver cancer
2 CFCs destroy ozone layer. How many ozone molecule a chlorine free radical can destroy
A. 10,000
B. 20,000
C. 100,000
D. 50,000
3 Atmosphere of big/metropolitan cities is polluted most by
A. Automobile exhausts
B. Pesticide residue
C. Household waste
D. Radio-active fall out
4 Ecosystem is a smaller unit of
A. Hydrosphere
B. Lithosphere
C. Biosphere
D. Atmosphere
5 DDT is
A. Biodegradable pollutant
B. Nondegradable pollutant
C. Not a pollutant
D. An antibiotic
6 Increased asthmatic attacks in certain seasons are related to
A. Inhalation of seasonal pollen
B. Eating of seasonal vegetables
C. Low temperature
D. Wet and dry environment
7 Which of the following is not an air
A. N2
B. N2O
C. NO
D. CO
8 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
A. Live stock waste
B. Oil leaks and spills
C. Disposal of industrial effluents
D. Rain
9 In the atmosphere, CO2is about
A. 0.01%
B. 0.03%
C. 0.05%
D. 0.09%
10 Chlorofluorocarbon, CF2CI2, plays an effective role in removing O3(ozone) in the stratosphere. Which reaction does not cause the depletion of ozone

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