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

Drained sewage has B.O.D

Question # 2

Domestic waste mostly constitutes

Question # 3

Chief source of water and soil pollution is

Question # 4

Drawback DDT as presticide is

Question # 5

Chloroflurocarbon releases a chemical harmful to ozone

Question # 6

Which causes water pollution?

Question # 7

Which heavy metals do not have any safe limits

Question # 8

Ultraviolet radiation from sun causes a reaction that produces

Question # 9

Depletion of ozone layer is due to

Question # 10

Environmental pollution affects

Question # 11

Chromium (VI) is highly toxic and can cause

Question # 12

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

Question # 13

The normal amount of overhead ozone is about

Question # 14

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 # 15

Which one is not a pollutant normally?

Question # 16

Oceans cove ______ percent of the surface of the earth

Question # 17

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

Question # 18

Ozone hole refers to

Question # 19

Photochemical smog is caused by

Question # 20

The film forming components of paints are

Question # 21

In Antarctica ozone depletion is due to the formation of following compound

Question # 22

The amount of Si in the lithosphere is about

Question # 23

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

Question # 24

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

Question # 25

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

Question # 26

Which is not a method for solid waste management

Question # 27

Which gasses are produced from landfills

Question # 28

Any substance in the environment which adversely affects the human health and natural functioning of the Ecosystem is known as

Question # 29

Which factor is helping to reduce the environmental pollution

Question # 30

Which of the following is not an air

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Which step is unnecessary for purification of water for drinking purposes
A. Aeration
B. Coagulation
C. Treatment with chlorine
D. Treatment with iodine
2 In the atmosphere, CO2is about
A. 0.01%
B. 0.03%
C. 0.05%
D. 0.09%
3 SO2Makes ______ acid rains
A. Carbonic acid
B. Sulfuric
C. Nitric acid
D. All of these
4 Which one is the major reason for pollution in high cities?
A. Fossil fuel
B. Acid rain
C. Heat dispersion
D. None of the above
5 Chloroflurocarbon releases a chemical harmful to ozone
A. Fluorine
B. Chlorine
C. Nitrogen peroxide
D. Sulphure dioxdie
6 Pollutant of automobile exhausts that affects nervous system/produces mental diseases is
A. Mercury
B. Lead
C. Nitrogen oxide
D. Sulphuric oxide
7 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
8 Which of the following is not an air
A. N2
B. N2O
C. NO
D. CO
9 Sulphur dioxide affects
A. Cell wall
B. Plasmodesmata
C. All membrane systems
D. Nucleus
10 Which of the following human activities are contaminating surface and ground waters
A. Pesticides
B. Septic tanks
C. Petroleum and natural gas production
D. All of these

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