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 is not a method for solid waste management

Question # 2

The % of CO2is the atmosphere is

Question # 3

In water the most important oxidizing agent is dissolved molecular oxygen which ranges from

Question # 4

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 # 5

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

Question # 6

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

Question # 7

The film forming components of paints are

Question # 8

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

Question # 9

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 # 10

Carbon monoxide is pollutant as it

Question # 11

Eutrophication causes reduction in

Question # 12

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

Question # 13

In incinerating the waste is burnt at

Question # 14

The region of earth capable of supporting life is

Question # 15

Result of ozone hole is

Question # 16

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

Question # 17

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

Question # 18

Which one is the major reason for pollution in high cities?

Question # 19

Soil salinity can be measured by

Question # 20

Ozone hole refers to

Question # 21

Acid rain is due to increase in atmospheric concentration of

Question # 22

Phosphate pollution is caused by

Question # 23

In purification of potable water the coagulant used is

Question # 24

Ecosystem is a smaller unit of

Question # 25

Atmosphere of big/metropolitan cities is polluted most by

Question # 26

Which one of the following is not air pollutant gas

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

B.O.D is connected with

Question # 29

A single chlorine free radical can destroy how many ozone molecules

Question # 30

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

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Exposure to CO results in
A. Headache
B. Fatigue
C. Unconsciousness
D. All of these
2 The pH range of the acid rain is
A. 8 - 7
B. 7 - 6.5
C. 6.5 - 6
D. Less than 5
3 Which of the following waste material is not recycled for use again
A. Paper
B. Plastic
C. Hides of animals
D. Glass
4 In water the most important oxidizing agent is dissolved molecular oxygen which ranges from
A. 2 - 4 ppm
B. 4 - 6 ppm
C. 2 - 5 ppm
D. 4 - 8 ppm
5 Sulphur dioxide affects
A. Cell wall
B. Plasmodesmata
C. All membrane systems
D. Nucleus
6 Hydrocarbans, SO2, CO, NH3, nitrogen oxides and compounds of fluorine are called
A. Primary pollutant
B. Secondary pollutant
C. Tertiary pollutant
D. None of these
7 The largest item which is recycled is
A. Newspaper
B. Plastic
C. Aluminium
D. Oil
8 Air pollution is not caused by
A. Pollen grains
B. Hydroelectric power
C. Industries
D. Automobiles
9 In the atmosphere, CO2is about
A. 0.01%
B. 0.03%
C. 0.05%
D. 0.09%
10 Swage water is purified by
A. Microorganisms
B. Light
C. Fishes
D. Aquatic plants

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