Biodiversity & Environmental Issues Test

Result

Biodiversity & Environmental Issues Test - 8

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Weekly Quiz Competition

Question 1
1 / -0.25

Smog which doesn ’t contain any secondary pollutants is:

A
Classical smog

B
Photochemical smog

C
Both of them

D
None of them

Solution

Correct Answer :- a
Explanation : Classical smog does not contain any secondary pollutants. It is a mixture of fog, sulfur dioxide and coal smoke particulates
Photochemical smog is composed of primary and secondary pollutants.Primary pollutants, which include nitrogen oxides and volatile organic compounds, are introduced into the atmosphere via vehicular emissions and industrial processes.Secondary pollutants, like ozone, result from the reaction of primary pollutants with ultraviolet light. It is most common in sunny and dry cities, like Los Angeles.
Question 2
1 / -0.25

Read the following statements:
i. carbondioxide is a qualitative pollutant.
ii. carbondioxide is already present in environment and is termed as pollutant when it ’s concentration increases in the environment:

A
Statement i is wrong and ii is correct

B
Statement ii is wrong and i is correct

C
Both are correct

D
Both are wrong

Solution

Carbon dioxide is a quantitative pollutant. This gas is already present in environment in small quantity. When its concentration increases in the environmentit is termed as pollutant. It may cause greenhouse effect also.
Question 3
1 / -0.25

The dust collection efficiency of Electrostatic precipitator is affected by the particle size of the aerosol to be collected, so :

A
efficiency is same at equal charges

B
the collection efficiency is high for the small particles, and low for the large particles

C
efficiency coincides with the change in charges on electrodes

D
the collection efficiency is high for the large particles, and low for the small particles

Solution

Electrostatic precipitator is used to remove particulate matters from chimneys of factories. The dust collection efficiency of electrostatic precipitator is affected by the particle siz of the aerosol to be collected so, the collection efficiency is high for large particles and low for the small particles.
Question 4
1 / -0.25

Planting trees on both the sides of roads and highways is called providing green muffler. It is to reduce :

A
solid waste pollution

B
noise pollution

C
air pollution

D
soil pollution

Solution

Planting trees on both the side of roads and highways is called providing green muffler. It is done to reduce noise pollution to nearby residential areas.
Question 5
1 / -0.25

Irreparable computers and other electronic goods are known as

A
m-wastes

B
soil wastes

C
p-wastes

D
e-wastes

Solution

Irreparable computers and other electronic goods are known as e-wastes or electronic wastes. E-wastes are buried in landfills or incinerated.
Question 6
1 / -0.25

Various methods applied for removing particulate pollutants from air employs:

A
Activated charcoal and calcium hydroxide

B
CNG and HFC

C
Bioreactors and electrostatic precipitators

D
Methanogens and bioreactors

Solution

For removing particulate pollutants from air various methods are applied such as use of activated charcoal and calcium hydroxide that absorbs the particulate matters form polluted air.
Question 7
1 / -0.25

Deoxygenation of water causes :
i. conversion of eutrophic water body back into oligotrophic.
ii. growth of anaerobic microbes producing secondary pollutants like H₂ S.

A
Statement i is correct but ii is wrong

B
Statement ii is correct but i is wrong

C
Both the statements are correct

D
Both the statements are wrong

Solution

Deoxygenation of water bodies means reducing the oxygen from the water. Deoxygenation do not convert eutrophic water body back into oligotrophic. In such waters growth of anaerobic microbes producing secondary pollutants like H₂ S.so, the statement i is wrong and ii is correct.
Question 8
1 / -0.25

Huge quantity of sewage is dumped in a river, the BOD will

A
Decrease

B
Increase

C
Remain unchanged

D
Slightly decrease

Solution

Huge quantity of sewage is dumped in a river, the BOD will increase as sewage contain large amount of organic matter that support large number of aquatic microbes that consume oxygen present in water.
Question 9
1 / -0.25

Acid rain is due to

A
Air pollution

B
Automobile pollution

C
Pesticide pollution

D
Water pollution

Solution

Acid rain is due to air pollution. Burning of fossils fuels release sulphur dioxide and nitrogen oxides that combine with water to form sulphuric acid and nitric acid during rain.
Question 10
1 / -0.25

Eutrophication of water body occurs due to addition of

A
Only fertilizers

B
Only sewage

C
Only detergents

D
Detergents, fertilizers and sewage.

Solution

Eutrophication of water body occurs due to addition of detergents, fertilizers and untreated sewage.

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Re-Attempt Weekly Quiz Competition

Biodiversity & Environmental Issues Test - 8

Result

Biodiversity & Environmental Issues Test - 8

Score

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Rank

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SHARING IS CARING

Question 1

Classical smog

Photochemical smog

Both of them

None of them

Solution

Question 2

Statement i is wrong and ii is correct

Statement ii is wrong and i is correct

Both are correct

Both are wrong

Solution

Question 3

efficiency is same at equal charges

the collection efficiency is high for the small particles, and low for the large particles

efficiency coincides with the change in charges on electrodes

the collection efficiency is high for the large particles, and low for the small particles

Solution

Question 4

solid waste pollution

noise pollution

air pollution

soil pollution

Solution

Question 5

m-wastes

soil wastes

p-wastes

e-wastes

Solution

Question 6

Activated charcoal and calcium hydroxide

CNG and HFC

Bioreactors and electrostatic precipitators

Methanogens and bioreactors

Solution

Question 7

Statement i is correct but ii is wrong

Statement ii is correct but i is wrong

Both the statements are correct

Both the statements are wrong

Solution

Question 8

Decrease

Increase

Remain unchanged

Slightly decrease

Solution

Question 9

Air pollution

Automobile pollution

Pesticide pollution

Water pollution

Solution

Question 10

Only fertilizers

Only sewage

Only detergents

Detergents, fertilizers and sewage.

Solution

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