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

The region of earth capable of supporting life is

Question # 2

A single chlorine free radical can destroy how many ozone molecules

Question # 3

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

Question # 4

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

Question # 5

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

Question # 6

Which one of the following is not air pollutant gas

Question # 7

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

Question # 8

As it passes into food chain, the concentration of DDT

Question # 9

Spraying of DDT produces pollution of

Question # 10

Mottling of teeth is due to presence of an element in drinking water

Question # 11

Eutrophication causes reduction in

Question # 12

Water pollution is mainly due to

Question # 13

The pH range of the acid rain is

Question # 14

Potable water is considered to be

Question # 15

Fungicides are the pesticides which

Question # 16

Drawback DDT as presticide is

Question # 17

Pick up the correct statement

Question # 18

Which causes water pollution?

Question # 19

Cyclone collector is used for minimizing

Question # 20

Ecology is a science of environment and deals specially with

Question # 21

Carbon monoxide is pollutant as it

Question # 22

Exposure to CO results in

Question # 23

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 # 24

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 # 25

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

Question # 26

Oceans cove ______ percent of the surface of the earth

Question # 27

Which of the following is not an air

Question # 28

Chief air pollutant which is likely to deplete ozone layer

Question # 29

Soil salinity can be measured by

Question # 30

Chromium (VI) is highly toxic and can cause

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Industrial effuents have toxic synthetic organic compounds as well as heavy metals like
A. Pb
B. Cr
C. Hg
D. All of these
2 Cyclone collector is used for minimizing
A. Radioactive pollution
B. Air pollution
C. Noise pollution
D. Water pollution
3 Carbon monoxide is pollutant as it
A. Inactivates nerves
B. Inhibits glycolysis
C. Combines with oxygen
D. Combines with hemoglobin
4 Air pollution is not caused by
A. Pollen grains
B. Hydroelectric power
C. Industries
D. Automobiles
5 Water is often treated with chlorine to
A. Increase oxygen content
B. Kill germs
C. Remove hardness
D. Remove suspended particles
6 Atmosphere of big/metropolitan cities is polluted most by
A. Automobile exhausts
B. Pesticide residue
C. Household waste
D. Radio-active fall out
7 What is the cause of water pollution
A. Chemical and bacterial contents in live stock
B. The spilled oil in rivers and ponds
C. Wide spread use of pesticides
D. All of the above
8 Which one is the most toxic?
A. Carbon
B. CO
C. CO2
D. SO2
9 The toxic organic compounds and heavy metals and metalloids results in contamination of
A. Surface water
B. Ground water
C. Both surface and ground water
D. Neither surface nor ground waters
10 The amount of Si in the lithosphere is about
A. 27.72%
B. 30.35%
C. 35.30%
D. 40.21%

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