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

Drained sewage has B.O.D

Question # 2

SO2Makes ______ acid rains

Question # 3

Acid rain is due to increase in atmospheric concentration of

Question # 4

Biodegradable pollutant is

Question # 5

Fungicides are the pesticides which

Question # 6

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

Question # 7

Which of the following is not an air

Question # 8

The amount of oxygen in the lithosphere is about

Question # 9

In the atmosphere, O2is about

Question # 10

Result of ozone hole is

Question # 11

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

Question # 12

Oceans cove ______ percent of the surface of the earth

Question # 13

SO2and NO2produce pollution by increasing

Question # 14

Exposure to CO results in

Question # 15

A pollutant affects

Question # 16

Ecology is a science of environment and deals specially with

Question # 17

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

Question # 18

Chloroflurocarbon releases a chemical harmful to ozone

Question # 19

Eutrophication causes reduction in

Question # 20

The % of CO2is the atmosphere is

Question # 21

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 # 22

UV radiations bring about

Question # 23

NO and NO2gases in atmosphere are represented by

Question # 24

Ecosystem is a smaller unit of

Question # 25

Which one is the most toxic?

Question # 26

Classical smog occurs in palces of

Question # 27

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

Question # 28

The pH range of the acid rain is

Question # 29

Air pollution is not caused by

Question # 30

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

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Pollution is
A. Removal of top soill
B. Release of toxic/undesirable materials in enevironment
C. Conversation of energy
D. All the above
2 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
3 Drained sewage has B.O.D
A. More than that of water
B. Less than that of water
C. Equal to that of water
D. None of the above
4 Acid rain is caused when various atmospheric gases dissolve in rain water. What are the gases that cause rain water
A. SO2
B. NO2
C. CO
D. A and b only
5 Environmental pollution affects
A. Biotic components
B. Plants only
C. Man only
D. Biotic and abiotic components of environment
6 As it passes into food chain, the concentration of DDT
A. Remains same
B. Decreases
C. Increases
D. Unpredictable
7 Which one is not a pollutant normally?
A. Hydrocarbons
B. Carbon dioxide
C. Carbon monoxide
D. Sulphur dioxide
8 Value of chemical oxygen demand (COD) is a measure of chemically oxidizable matter in water. Which value of COD will indicate more polluted water
A. Low value
B. Higher value
C. Both values
D. None of these
9 The % of CO2is the atmosphere is
A. 3.0%
B. 0.03%
C. 0.3%
D. 0.5%
10 Contamination of Hg comes into surface water from chlor industrial wastes. Why is Hg toxic
A. It attaches to sulphur of the disulphide link
B. Hg is a heavy metal
C. Hg is liquid at room temperature
D. Hg is non reactive chemically

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