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

As it passes into food chain, the concentration of DDT

Question # 2

Which of the following is not an air

Question # 3

Polycyolic aromatic hydrocarbons are taught to be

Question # 4

Which of the following waste material is not recycled for use again

Question # 5

Burning of fossil fuels is the main source of pollution

Question # 6

Result of ozone hole is

Question # 7

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

Question # 8

Shahi Qilla may be destroyed by

Question # 9

Eutrophication causes reduction in

Question # 10

Acid rain is caused when various atmospheric gases dissolve in rain water. What are the gases that cause rain water

Question # 11

Sulphur dioxide affects

Question # 12

Ozone depletion in stratosphere shall result in

Question # 13

The region of earth capable of supporting life is

Question # 14

Ozone layer of stratosphere requires protection from indiscriminate use of

Question # 15

Which one is the most toxic?

Question # 16

SO2Makes ______ acid rains

Question # 17

Acid rains are produced by

Question # 18

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 # 19

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

Question # 20

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

Question # 21

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

Question # 22

Exposure to CO results in

Question # 23

Drained sewage has B.O.D

Question # 24

Ecology is a science of environment and deals specially with

Question # 25

Increasing skin cancer and high mutation rate are due to

Question # 26

Photochemical smog is caused by

Question # 27

Carbon monoxide is harmful to human beings as it

Question # 28

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

Question # 29

In purification of potable water the coagulant used is

Question # 30

Contamination of Hg comes into surface water from chlor industrial wastes. Why is Hg toxic

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Atomospheric pollutant is
A. CO2
B. CO
C. O2
D. N2
2 Chlorofluorocarbon, CF2CI2, plays an effective role in removing O3(ozone) in the stratosphere. Which reaction does not cause the depletion of ozone
3 Burning of fossil fuels is the main source of pollution
A. Nitrogen oxide
B. Nitric oxide
C. Nitrous oxide
D. Sulphur dioxide
4 Which one is not a pollutant normally?
A. Hydrocarbons
B. Carbon dioxide
C. Carbon monoxide
D. Sulphur dioxide
5 Ozone in most of the tropical regions acts as a pollutant and causes
A. Damages to eyes
B. Aggravates asthma
C. Chest discomfort
D. All of these
6 Biodegradable pollutant is
A. Plastic
B. Asbestos
C. Sewage
D. Mercury
7 Minamata disease is due to pollution of
A. Organic waste into drinking water
B. Oil spill in water
C. Industrial waste containing mercury into fishing water
D. Arsenic into the atmosphere
8 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
9 B.O.D is connected with
A. Organic matter
B. Microbes
C. Mircrobes and organic matter
D. None of the above
10 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
A. Iodine
B. Bromine
C. Lead
D. Carbon

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