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

Industrial effuents have toxic synthetic organic compounds as well as heavy metals like

Question # 2

Ecology is a science of environment and deals specially with

Question # 3

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

Question # 4

Most hazardous metal pollutant of automobile exhaust is

Question # 5

Which heavy metals do not have any safe limits

Question # 6

NO and NO2gases in atmosphere are represented by

Question # 7

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

Question # 8

Chief air pollutant which is likely to deplete ozone layer

Question # 9

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

Question # 10

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

Question # 11

Chloroflurocarbon releases a chemical harmful to ozone

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

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

Question # 14

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

Question # 15

Which gasses are produced from landfills

Question # 16

A single chlorine free radical can destroy how many ozone molecules

Question # 17

Carbon monoxide is harmful to human beings as it

Question # 18

Spraying of DDT produces pollution of

Question # 19

Water pollution is mainly due to

Question # 20

Biodegradable pollutant is

Question # 21

Environmental pollution affects

Question # 22

Ozone layer of stratosphere requires protection from indiscriminate use of

Question # 23

Ozone depletion in stratosphere shall result in

Question # 24

Value of chemical oxygen demand (COD) is a measure of chemically oxidizable matter in water. Which value of COD will indicate more polluted water

Question # 25

Atmosphere of big/metropolitan cities is polluted most by

Question # 26

The largest item which is recycled is

Question # 27

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

Question # 28

In incinerating the waste is burnt at

Question # 29

Ultraviolet radiation from sun causes a reaction that produces

Question # 30

Exposure to CO results in

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Which gasses are produced from landfills
A. NH3
B. H2S
C. N2
D. All of these
2 SO2and NO2produce pollution by increasing
A. Alkalinity
B. Acidity
C. Neutrality
D. Buffer action
3 Which heavy metals do not have any safe limits
A. As
B. Hg
C. Cr
D. All of these
4 Polycyolic aromatic hydrocarbons are taught to be
A. Disinfectant
B. Carcinogenic
C. Helpful
D. Reactive
5 A pollutant affects
A. Human health
B. Quality of life
C. Functioning of ecosystem
D. All of these
6 SO2Makes ______ acid rains
A. Carbonic acid
B. Sulfuric
C. Nitric acid
D. All of these
7 Industrial effuents have toxic synthetic organic compounds as well as heavy metals like
A. Pb
B. Cr
C. Hg
D. All of these
8 Ozone hole refers to
A. Hole in ozone layers
B. Reduction in thickness of ozone layer in stratosphere
C. Reduction of thickness of ozone in troposphere
D. Increase concentration of ozone
9 Fungicides are the pesticides which
A. Control the growth of fungus
B. Kill insects
C. Kill plants
D. Kill herbs
10 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

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