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

A single chlorine free radical can destroy how many ozone molecules

Question # 2

The amount of oxygen in the lithosphere is about

Question # 3

Which step is unnecessary for purification of water for drinking purposes

Question # 4

Domestic waste mostly constitutes

Question # 5

The largest item which is recycled is

Question # 6

Carbon monoxide is pollutant as it

Question # 7

Ground and surface waters are contaminated and become polluted due to the human activity. Which human activity will bot cause water pollution

Question # 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

Question # 9

Ecology is a science of environment and deals specially with

Question # 10

Swage water is purified by

Question # 11

Ozone hole is maximum over

Question # 12

In the atmosphere, CO2is about

Question # 13

Chromium (VI) is highly toxic and can cause

Question # 14

Which one is the most toxic?

Question # 15

Atmosphere of big/metropolitan cities is polluted most by

Question # 16

Drawback DDT as presticide is

Question # 17

A pollutant affects

Question # 18

Soil salinity can be measured by

Question # 19

Atomospheric pollutant is

Question # 20

The region of earth capable of supporting life is

Question # 21

The normal amount of overhead ozone is about

Question # 22

In purification of potable water the coagulant used is

Question # 23

Ozone hole refers to

Question # 24

Which of the following human activities are contaminating surface and ground waters

Question # 25

Increasing skin cancer and high mutation rate are due to

Question # 26

Which factor is helping to reduce the environmental pollution

Question # 27

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

Question # 28

One of the environmental problem is the formation of oil slicks when oil is spilled from tankers in sea water. Which treatment is suitable to remove oil slicks

Question # 29

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

Question # 30

Acid rain is due to increase in atmospheric concentration of

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 The pH range of the acid rain is
A. 8 - 7
B. 7 - 6.5
C. 6.5 - 6
D. Less than 5
2 Ground and surface waters are contaminated and become polluted due to the human activity. Which human activity will bot cause water pollution
A. Live stock waste
B. Agricultural pesticides
C. Oil breaks and spills
D. All of the above
3 The amount of oxygen in the lithosphere is about
A. 35.50%
B. 40.60%
C. 56.60%
D. 50.50%
4 Chlorofluorocarbon, CF2CI2, plays an effective role in removing O3(ozone) in the stratosphere. Which reaction does not cause the depletion of ozone
5 Air pollution is not caused by
A. Pollen grains
B. Hydroelectric power
C. Industries
D. Automobiles
6 The % of CO2is the atmosphere is
A. 3.0%
B. 0.03%
C. 0.3%
D. 0.5%
7 Pollutant of automobile exhausts that affects nervous system/produces mental diseases is
A. Mercury
B. Lead
C. Nitrogen oxide
D. Sulphuric oxide
8 UV radiations bring about
A. Skin cancer
B. Mouth cancer
C. Lung cancer
D. Liver cancer
9 Environmental pollution affects
A. Biotic components
B. Plants only
C. Man only
D. Biotic and abiotic components of environment
10 Mottling of teeth is due to presence of an element in drinking water
A. Mercury
B. Fluorine
C. Boron
D. Chlorine

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