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

Chromium (VI) is highly toxic and can cause

Question # 2

Atmosphere of big/metropolitan cities is polluted most by

Question # 3

Which gasses are produced from landfills

Question # 4

Photochemical smog is caused by

Question # 5

Sulphur dioxide affects

Question # 6

The toxic organic compounds and heavy metals and metalloids results in contamination of

Question # 7

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

Question # 8

DDT is

Question # 9

BOD is

Question # 10

Biodegradable pollutant is

Question # 11

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

Question # 12

The amount of oxygen in the lithosphere is about

Question # 13

Burning of fossil fuels is the main source of pollution

Question # 14

Ozone depletion in stratosphere shall result in

Question # 15

The amount of Si in the lithosphere is about

Question # 16

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

Question # 17

When rain is accompanied by a thunderstorm, the collected rain water will have a pH value

Question # 18

Increasing skin cancer and high mutation rate are due to

Question # 19

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

Question # 20

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

Question # 21

The film forming components of paints are

Question # 22

Water which his considered to be safe for human consumption is known as

Question # 23

The 95.5% mass of Lithosphone is made of 11 elements i.e. O2, Si, Al, Fe, Ca, Na, K, Mg, Ti, H2and P. which element is present in trace amount

Question # 24

What is the cause of water pollution

Question # 25

Ozone layer of stratosphere requires protection from indiscriminate use of

Question # 26

Ultraviolet radiation from sun causes a reaction that produces

Question # 27

Pick up the correct statement

Question # 28

A single chlorine free radical can destroy how many ozone molecules

Question # 29

Ozone hole refers to

Question # 30

In the atmosphere, O2is about

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Chief source of water and soil pollution is
A. Mining
B. Thermal power plant
C. Agro-industry
D. All the above
2 Chromium (VI) is highly toxic and can cause
A. Blindness
B. Cancer
C. Liver problems
D. Blood problems
3 B.O.D is connected with
A. Organic matter
B. Microbes
C. Mircrobes and organic matter
D. None of the above
4 Water pollution is mainly due to
A. Sulphure dioxide
B. Carbon dioxide
C. Oxygen
D. Industrial discharges
5 Domestic waste mostly constitutes
A. Non-biodegradable pollution
B. Biodegradable pollution
C. Effluents
D. Air pollution
6 A single chlorine free radical can destroy how many ozone molecules
A. 100
B. 100000
C. 10000
D. 10
7 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
A. Live stock waste
B. Oil leaks and spills
C. Disposal of industrial effluents
D. Rain
8 Swage water is purified by
A. Microorganisms
B. Light
C. Fishes
D. Aquatic plants
9 Any substance in the environment which adversely affects the human health and natural functioning of the Ecosystem is known as
A. Environment
B. Hydrosphere
C. Pollutant
D. Biosphere
10 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

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