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

A single chlorine free radical can destroy how many ozone molecules

Question # 2

Which of the following is not an air

Question # 3

In the atmosphere, CO2is about

Question # 4

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

Question # 5

DDT is

Question # 6

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 # 7

Which one of the following dissolves more rapidly in blood hemoglobin than oxygen?

Question # 8

Biodegradable pollutant is

Question # 9

Which step is unnecessary for purification of water for drinking purposes

Question # 10

Contamination of Hg comes into surface water from chlor industrial wastes. Why is Hg toxic

Question # 11

The amount of Si in the lithosphere is about

Question # 12

Ecosystem is a smaller unit of

Question # 13

Carbon monoxide is harmful to human beings as it

Question # 14

In the atmosphere, O2is about

Question # 15

In purification of potable water the coagulant used is

Question # 16

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 # 17

Exposure to CO results in

Question # 18

Ozone depletion in stratosphere shall result in

Question # 19

Atomospheric pollutant is

Question # 20

Acid rains are produced by

Question # 21

As it passes into food chain, the concentration of DDT

Question # 22

Cyclone collector is used for minimizing

Question # 23

Photochemical smog is caused by

Question # 24

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

Question # 25

Domestic waste mostly constitutes

Question # 26

Drawback DDT as presticide is

Question # 27

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

Question # 28

Fungicides are the pesticides which

Question # 29

Drained sewage has B.O.D

Question # 30

Depletion of ozone layer is due to

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 The pH range of the acid rain is
A. 8 - 7
B. 7 - 6.5
C. 6.5 - 6
D. Less than 5
2 Water which his considered to be safe for human consumption is known as
A. Distilled water
B. Contaminated water
C. Potable water
D. Rain water
3 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
4 Most hazardous metal pollutant of automobile exhaust is
A. Mercury
B. Lead
C. Cadmium
D. Copper
5 Pick up the correct statement
A. CO which is major pollutant resulting from the combustion of fuels in automobile plays a major role in photochemical smog
B. Classical smog has an oxidizing character while the phtochemical smog is reducing in character
C. Photochemical smog occurs in day time whereas the classical smog occurs in early morning hours
D. During formation of smog the level of ozone in the atmosphere goes down
6 Photochemical smog is caused by
A. CO
B. CO2
C. O3
D. NO2
7 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
8 Domestic waste mostly constitutes
A. Non-biodegradable pollution
B. Biodegradable pollution
C. Effluents
D. Air pollution
9 Depletion of ozone layer is due to
A. Oxides of nitrogen
B. Oxides of carbon
C. Oxides of sulphur
D. None of the above
10 Chromium (VI) is highly toxic and can cause
A. Blindness
B. Cancer
C. Liver problems
D. Blood problems

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