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

Eutrophication causes reduction in

Question # 2

What is the cause of water pollution

Question # 3

Classical smog occurs in palces of

Question # 4

Which of the following is not an air

Question # 5

The pH range of the acid rain is

Question # 6

Increasing skin cancer and high mutation rate are due to

Question # 7

The film forming components of paints are

Question # 8

NO and NO2gases in atmosphere are represented by

Question # 9

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

Question # 10

Which heavy metals do not have any safe limits

Question # 11

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

Question # 12

Drained sewage has B.O.D

Question # 13

Burning of fossil fuels is the main source of pollution

Question # 14

Ozone hole refers to

Question # 15

A pollutant affects

Question # 16

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

Question # 17

Minamata disease is due to pollution of

Question # 18

In the atmosphere, O2is about

Question # 19

Chief air pollutant which is likely to deplete ozone layer

Question # 20

Oceans cove ______ percent of the surface of the earth

Question # 21

Soil salinity can be measured by

Question # 22

Acid rains are produced by

Question # 23

The normal amount of overhead ozone is about

Question # 24

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

Question # 25

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

Question # 26

Which one is not a pollutant normally?

Question # 27

UV radiations bring about

Question # 28

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

Question # 29

Chromium (VI) is highly toxic and can cause

Question # 30

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

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 A single chlorine free radical can destroy how many ozone molecules
A. 100
B. 100000
C. 10000
D. 10
2 Which one is the major reason for pollution in high cities?
A. Fossil fuel
B. Acid rain
C. Heat dispersion
D. None of the above
3 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
4 Increased asthmatic attacks in certain seasons are related to
A. Inhalation of seasonal pollen
B. Eating of seasonal vegetables
C. Low temperature
D. Wet and dry environment
5 Swage water is purified by
A. Microorganisms
B. Light
C. Fishes
D. Aquatic plants
6 Drawback DDT as presticide is
A. I becomes ineffective after some time
B. It is less effective than others
C. It is not easily/rapidly degraded in nature
D. Its high cost
7 Soil salinity can be measured by
A. Calorimeter
B. Potometer
C. Porometer
D. Conducitvity meter
8 Industrial effuents have toxic synthetic organic compounds as well as heavy metals like
A. Pb
B. Cr
C. Hg
D. All of these
9 Domestic waste mostly constitutes
A. Non-biodegradable pollution
B. Biodegradable pollution
C. Effluents
D. Air pollution
10 Which one of the following dissolves more rapidly in blood hemoglobin than oxygen?
A. Ozone
B. Nitrous oxide
C. Sulphure dioxide
D. Carbon monoxide

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