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

Result of ozone hole is

Question # 2

Chief source of water and soil pollution is

Question # 3

Ozone depletion in stratosphere shall result in

Question # 4

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

Question # 5

Atmosphere of big/metropolitan cities is polluted most by

Question # 6

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

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

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

Question # 9

Burning of fossil fuels is the main source of pollution

Question # 10

The % of CO2is the atmosphere is

Question # 11

B.O.D is connected with

Question # 12

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 # 13

The amount of Si in the lithosphere is about

Question # 14

NO and NO2gases in atmosphere are represented by

Question # 15

Which gas is not a constituent of atmosphere

Question # 16

Chloroflurocarbon releases a chemical harmful to ozone

Question # 17

Increasing skin cancer and high mutation rate are due to

Question # 18

Which is not a method for solid waste management

Question # 19

The region of earth capable of supporting life is

Question # 20

Chief air pollutant which is likely to deplete ozone layer

Question # 21

Potable water is considered to be

Question # 22

Which factor is helping to reduce the environmental pollution

Question # 23

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

Question # 24

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 # 25

What is the cause of water pollution

Question # 26

Ultraviolet radiation from sun causes a reaction that produces

Question # 27

Environmental pollution affects

Question # 28

The pH range of the acid rain is

Question # 29

The largest item which is recycled is

Question # 30

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

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Pick up the correct statement
A. CO which is major pollutant resulting from the combustion of fuels in automobile plays a major role in photochemical smog
B. Classical smog has an oxidizing character while the phtochemical smog is reducing in character
C. Photochemical smog occurs in day time whereas the classical smog occurs in early morning hours
D. During formation of smog the level of ozone in the atmosphere goes down
2 Swage water is purified by
A. Microorganisms
B. Light
C. Fishes
D. Aquatic plants
3 Chief air pollutant which is likely to deplete ozone layer
A. Sulphure dioxide
B. Carbon dioxide
C. Nitrogen oxides and chloro fluorocarbons
4 Shahi Qilla may be destroyed by
A. Flood in Ravi
B. Temperature mediated spoilage of marble
C. Air pollutants from Lahore chemical industries
D. All the above
5 Biodegradable pollutant is
A. Plastic
B. Asbestos
C. Sewage
D. Mercury
6 The pH of the rain water in areas where acid rain is the cause of pollution may be
A. 6.5
B. 5.6
C. 4.5
D. 2.2
7 Which factor is helping to reduce the environmental pollution
A. Rapid growth of population
B. Urbanization
C. Industrialization
D. Increase of plantation
8 Potable water is considered to be
A. Safe for human consumption
B. Not safe for human consumption
C. The surface water
D. The ground water
9 SO2Makes ______ acid rains
A. Carbonic acid
B. Sulfuric
C. Nitric acid
D. All of these
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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