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

00:00
Question # 1

Air pollution is not caused by

Question # 2

As it passes into food chain, the concentration of DDT

Question # 3

Which one is not a pollutant normally?

Question # 4

DDT is

Question # 5

Which step is unnecessary for purification of water for drinking purposes

Question # 6

Ecosystem is a smaller unit of

Question # 7

Most hazardous metal pollutant of automobile exhaust is

Question # 8

Ultraviolet radiation from sun causes a reaction that produces

Question # 9

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

Question # 10

Ozone depletion in stratosphere shall result in

Question # 11

Domestic waste mostly constitutes

Question # 12

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

Question # 13

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

Question # 14

What is the cause of water pollution

Question # 15

BOD is

Question # 16

SO2Makes ______ acid rains

Question # 17

Which heavy metals do not have any safe limits

Question # 18

Which gasses are produced from landfills

Question # 19

Increasing skin cancer and high mutation rate are due to

Question # 20

When rain is accompanied by a thunderstorm, the collected rain water will have a pH value

Question # 21

Cyclone collector is used for minimizing

Question # 22

A pollutant affects

Question # 23

Carbon monoxide is pollutant as it

Question # 24

UV radiations bring about

Question # 25

Ozone hole refers to

Question # 26

In the atmosphere, O2is about

Question # 27

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

Question # 28

In purification of potable water the coagulant used is

Question # 29

Pollution is

Question # 30

Pick up the correct statement

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Water is often treated with chlorine to
A. Increase oxygen content
B. Kill germs
C. Remove hardness
D. Remove suspended particles
2 DDT is
A. Biodegradable pollutant
B. Nondegradable pollutant
C. Not a pollutant
D. An antibiotic
3 Ozone depletion in stratosphere shall result in
A. Forest fires
B. Increased incidence of skin cancer
C. Global warming
D. None of the above
4 Biodegradable pollutant is
A. Plastic
B. Asbestos
C. Sewage
D. Mercury
5 Fungicides are the pesticides which
A. Control the growth of fungus
B. Kill insects
C. Kill plants
D. Kill herbs
6 Burning of fossil fuels is the main source of pollution
A. Nitrogen oxide
B. Nitric oxide
C. Nitrous oxide
D. Sulphur dioxide
7 A single chlorine free radical can destroy how many ozone molecules
A. 100
B. 100000
C. 10000
D. 10
8 Ground and surface waters are contaminated and become polluted due to the human activity. Which human activity will bot cause water pollution
A. Live stock waste
B. Agricultural pesticides
C. Oil breaks and spills
D. All of the above
9 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
10 To purify water which has mud dissolved in it, A substance which coagulates the suspended particles is used. The coagulant may be
A. Ag+
B. Cu2+
C. Al3+
D. Si4+

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