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

Polycyolic aromatic hydrocarbons are taught to be

Question # 2

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

Question # 3

BOD is

Question # 4

Potable water is considered to be

Question # 5

Depletion of ozone layer is due to

Question # 6

Which one is the major reason for pollution in high cities?

Question # 7

Which heavy metals do not have any safe limits

Question # 8

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

Question # 9

Swage water is purified by

Question # 10

The normal amount of overhead ozone is about

Question # 11

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

Question # 12

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

Question # 13

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 # 14

A pollutant affects

Question # 15

Exposure to CO results in

Question # 16

The pH range of the acid rain is

Question # 17

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

Question # 18

The region of earth capable of supporting life is

Question # 19

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

Question # 20

Carbon monoxide is harmful to human beings as it

Question # 21

Ozone layer of stratosphere requires protection from indiscriminate use of

Question # 22

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

Question # 23

Soil remediation means

Question # 24

Hydrocarbans, SO2, CO, NH3, nitrogen oxides and compounds of fluorine are called

Question # 25

Eutrophication causes reduction in

Question # 26

Minamata disease is due to pollution of

Question # 27

The % of CO2is the atmosphere is

Question # 28

Ultraviolet radiation from sun causes a reaction that produces

Question # 29

NO and NO2gases in atmosphere are represented by

Question # 30

Ozone hole refers to

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ECAT Chapter 27 Important MCQ's

Sr.# Question Answer
1 CFCs destroy ozone layer. How many ozone molecule a chlorine free radical can destroy
A. 10,000
B. 20,000
C. 100,000
D. 50,000
2 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
3 Depletion of ozone layer is due to
A. Oxides of nitrogen
B. Oxides of carbon
C. Oxides of sulphur
D. None of the above
4 Spraying of DDT produces pollution of
A. Air
B. Air and water
C. Air and soil
D. Air, water and soil
5 Chromium (VI) is highly toxic and can cause
A. Blindness
B. Cancer
C. Liver problems
D. Blood problems
6 Chloroflurocarbon releases a chemical harmful to ozone
A. Fluorine
B. Chlorine
C. Nitrogen peroxide
D. Sulphure dioxdie
7 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
8 Which gasses are produced from landfills
A. NH3
B. H2S
C. N2
D. All of these
9 Chlorofluorocarbon, CF2CI2, plays an effective role in removing O3(ozone) in the stratosphere. Which reaction does not cause the depletion of ozone
10 Chief source of water and soil pollution is
A. Mining
B. Thermal power plant
C. Agro-industry
D. All the above

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