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

Ecosystem is a smaller unit of

Question # 2

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

Question # 3

Ultraviolet radiation from sun causes a reaction that produces

Question # 4

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

Question # 5

The normal amount of overhead ozone is about

Question # 6

Photochemical smog is caused by

Question # 7

Shahi Qilla may be destroyed by

Question # 8

Which one of the following is not air pollutant gas

Question # 9

Soil salinity can be measured by

Question # 10

Ecology is a science of environment and deals specially with

Question # 11

Ozone hole refers to

Question # 12

Which is not the condition for the formation of smog

Question # 13

Carbon monoxide is harmful to human beings as it

Question # 14

Increasing skin cancer and high mutation rate are due to

Question # 15

Ozone layer of stratosphere requires protection from indiscriminate use of

Question # 16

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

Question # 17

Water is often treated with chlorine to

Question # 18

Carbon monoxide is pollutant as it

Question # 19

Oceans cove ______ percent of the surface of the earth

Question # 20

Burning of fossil fuels is the main source of pollution

Question # 21

Which factor is helping to reduce the environmental pollution

Question # 22

In the atmosphere, CO2is about

Question # 23

Soil remediation means

Question # 24

Water pollution is mainly due to

Question # 25

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

Question # 26

Potable water is considered to be

Question # 27

B.O.D is connected with

Question # 28

Which gas is not a constituent of atmosphere

Question # 29

The pH of the rain water in areas where acid rain is the cause of pollution may be

Question # 30

The amount of oxygen in the lithosphere is about

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Ozone hole refers to
A. Hole in ozone layers
B. Reduction in thickness of ozone layer in stratosphere
C. Reduction of thickness of ozone in troposphere
D. Increase concentration of ozone
2 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
3 Classical smog occurs in palces of
A. Excess SO2
B. Low temperature
C. High temperature
D. Excess NH3
4 Ozone layer of stratosphere requires protection from indiscriminate use of
A. Fungicides, insecticides, bactericides and medicines
B. Aerosols and high flying jets
C. Atomic explosions and industrial wastes
D. Baloons and turbo-prop aeroplanes
5 Which gas is not a constituent of atmosphere
A. Xe
B. O3
C. H2
D. F2
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 In the atmosphere, O2is about
A. 10%
B. 15%
C. 21%
D. 25%
8 As it passes into food chain, the concentration of DDT
A. Remains same
B. Decreases
C. Increases
D. Unpredictable
9 To purify water which has mud dissolved in it, A substance which coagulates the suspended particles is used. The coagulant may be
A. Ag+
B. Cu2+
C. Al3+
D. Si4+
10 Atomospheric pollutant is
A. CO2
B. CO
C. O2
D. N2

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