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

Increased asthmatic attacks in certain seasons are related to

Question # 2

Water is often treated with chlorine to

Question # 3

In Antarctica ozone depletion is due to the formation of following compound

Question # 4

UV radiations bring about

Question # 5

Ozone hole refers to

Question # 6

Air pollution is not caused by

Question # 7

Which of the following forms a toxic substance in blood by combing with hemoglobin?

Question # 8

The region of earth capable of supporting life is

Question # 9

Eutrophication causes reduction in

Question # 10

As it passes into food chain, the concentration of DDT

Question # 11

Result of ozone hole is

Question # 12

Which one is the most toxic?

Question # 13

Chloroflurocarbon releases a chemical harmful to ozone

Question # 14

Acid rains are produced by

Question # 15

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

Question # 16

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

Question # 17

Increasing skin cancer and high mutation rate are due to

Question # 18

A single chlorine free radical can destroy how many ozone molecules

Question # 19

Oceans cove ______ percent of the surface of the earth

Question # 20

Chromium (VI) is highly toxic and can cause

Question # 21

Potable water is considered to be

Question # 22

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

Question # 23

Carbon monoxide is pollutant as it

Question # 24

Ozone layer of stratosphere requires protection from indiscriminate use of

Question # 25

Which gasses are produced from landfills

Question # 26

Photochemical smog is caused by

Question # 27

NO and NO2gases in atmosphere are represented by

Question # 28

Acid rain is due to increase in atmospheric concentration of

Question # 29

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

Question # 30

Which is not the affect of polluted air on environment

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 UV radiations bring about
A. Skin cancer
B. Mouth cancer
C. Lung cancer
D. Liver cancer
2 B.O.D is connected with
A. Organic matter
B. Microbes
C. Mircrobes and organic matter
D. None of the above
3 SO2and NO2produce pollution by increasing
A. Alkalinity
B. Acidity
C. Neutrality
D. Buffer action
4 In the atmosphere, O2is about
A. 10%
B. 15%
C. 21%
D. 25%
5 Acid rains are produced by
A. Excess NO2and SO2 from burining fossil fuels
B. Excess production of NH3by industry and coal gas
C. Excess release of carbon monoxide by incomplete combustion
D. Excess formation of CO2by combustion and animal respiration
6 Chief air pollutant which is likely to deplete ozone layer
A. Sulphure dioxide
B. Carbon dioxide
C. Nitrogen oxides and chloro fluorocarbons
7 Which gas is not a constituent of atmosphere
A. Xe
B. O3
C. H2
D. F2
8 In the atmosphere, CO2is about
A. 0.01%
B. 0.03%
C. 0.05%
D. 0.09%
9 Which of the following waste material is not recycled for use again
A. Paper
B. Plastic
C. Hides of animals
D. Glass
10 Exposure to CO results in
A. Headache
B. Fatigue
C. Unconsciousness
D. All of these

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