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

Chief source of water and soil pollution is

Question # 2

Which is not a component of environment

Question # 3

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

Question # 4

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

Question # 5

What is the cause of water pollution

Question # 6

Chromium (VI) is highly toxic and can cause

Question # 7

The amount of oxygen in the lithosphere is about

Question # 8

Burning of fossil fuels is the main source of pollution

Question # 9

Swage water is purified by

Question # 10

Which step is unnecessary for purification of water for drinking purposes

Question # 11

SO2Makes ______ acid rains

Question # 12

Pick up the correct statement

Question # 13

Oceans cove ______ percent of the surface of the earth

Question # 14

The toxic organic compounds and heavy metals and metalloids results in contamination of

Question # 15

Chlorofluorocarbon, CF2CI2, plays an effective role in removing O3(ozone) in the stratosphere. Which reaction does not cause the depletion of ozone

Question # 16

The largest item which is recycled is

Question # 17

Air pollution is not caused by

Question # 18

Drawback DDT as presticide is

Question # 19

The % of CO2is the atmosphere is

Question # 20

Which is not the condition for the formation of smog

Question # 21

Cyclone collector is used for minimizing

Question # 22

Which one of the following is not air pollutant gas

Question # 23

Polycyolic aromatic hydrocarbons are taught to be

Question # 24

Soil remediation means

Question # 25

A pollutant affects

Question # 26

Result of ozone hole is

Question # 27

Atmosphere of big/metropolitan cities is polluted most by

Question # 28

Environmental pollution affects

Question # 29

Spraying of DDT produces pollution of

Question # 30

Sulphur dioxide affects

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 In the atmosphere, O2is about
A. 10%
B. 15%
C. 21%
D. 25%
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 Ozone in most of the tropical regions acts as a pollutant and causes
A. Damages to eyes
B. Aggravates asthma
C. Chest discomfort
D. All of these
4 The % of CO2is the atmosphere is
A. 3.0%
B. 0.03%
C. 0.3%
D. 0.5%
5 Water is often treated with chlorine to
A. Increase oxygen content
B. Kill germs
C. Remove hardness
D. Remove suspended particles
6 The amount of oxygen in the lithosphere is about
A. 35.50%
B. 40.60%
C. 56.60%
D. 50.50%
7 Which is not a method for solid waste management
A. Landfill
B. Incinerating
C. Recycling
D. None 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 Spraying of DDT produces pollution of
A. Air
B. Air and water
C. Air and soil
D. Air, water and soil
10 In the atmosphere, CO2is about
A. 0.01%
B. 0.03%
C. 0.05%
D. 0.09%

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