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

Which one of the following is not air pollutant gas

Question # 2

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

Question # 3

As it passes into food chain, the concentration of DDT

Question # 4

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

Question # 5

Water is often treated with chlorine to

Question # 6

What is the cause of water pollution

Question # 7

Drained sewage has B.O.D

Question # 8

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

Question # 9

Acid rains are produced by

Question # 10

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

Question # 11

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

Question # 12

The pH range of the acid rain is

Question # 13

Water pollution is mainly due to

Question # 14

Ozone depletion in stratosphere shall result in

Question # 15

Classical smog occurs in palces of

Question # 16

Hydrocarbans, SO2, CO, NH3, nitrogen oxides and compounds of fluorine are called

Question # 17

The largest item which is recycled is

Question # 18

Atmosphere of big/metropolitan cities is polluted most by

Question # 19

The film forming components of paints are

Question # 20

Which of the following is responsible for depletion of the ozone layer in the upper strata of the atmosphere?

Question # 21

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

Question # 22

Soil salinity can be measured by

Question # 23

Ultraviolet radiation from sun causes a reaction that produces

Question # 24

In purification of potable water the coagulant used is

Question # 25

Cyclone collector is used for minimizing

Question # 26

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

Question # 27

Chief source of water and soil pollution is

Question # 28

Burning of fossil fuels is the main source of pollution

Question # 29

Ecosystem is a smaller unit of

Question # 30

Spraying of DDT produces pollution of

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Swage water is purified by
A. Microorganisms
B. Light
C. Fishes
D. Aquatic plants
2 Mottling of teeth is due to presence of an element in drinking water
A. Mercury
B. Fluorine
C. Boron
D. Chlorine
3 Ecology is a science of environment and deals specially with
A. Stratosphere
B. Biosphere
C. Lithosphere
D. Hydrosphere
4 In the atmosphere, CO2is about
A. 0.01%
B. 0.03%
C. 0.05%
D. 0.09%
5 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
6 Which one of the following dissolves more rapidly in blood hemoglobin than oxygen?
A. Ozone
B. Nitrous oxide
C. Sulphure dioxide
D. Carbon monoxide
7 Which factor is helping to reduce the environmental pollution
A. Rapid growth of population
B. Urbanization
C. Industrialization
D. Increase of plantation
8 A single chlorine free radical can destroy how many ozone molecules
A. 100
B. 100000
C. 10000
D. 10
9 Which of the following is not an air
A. N2
B. N2O
C. NO
D. CO
10 CFCs destroy ozone layer. How many ozone molecule a chlorine free radical can destroy
A. 10,000
B. 20,000
C. 100,000
D. 50,000

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