Environmental Issues Test

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Environmental Issues Test - 6

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Weekly Quiz Competition

Question 1
1 / -0

In polluted water body :
i. Species diversity is low.
ii. High species diversity is indication of pollution.

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

In polluted water body species diversity is low as in polluted water do not support a number of microbes and other aquatic organisms. Low species diversity is indication of pollution.
Question 2
1 / -0

Deoxygenation of water causes :
i. conversion of eutrophic water body back into oligotrophic.
ii. growth of anaerobic microbes producing secondary pollutants like H₂S.

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 H₂S.
Question 3
1 / -0

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

A
Decrease

B
Remain unchanged

C
Slightly decrease

D
Increase

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 4
1 / -0

Domestic waste is

A
Air pollutant

B
Effluent

C
Non-biodegradable

D
Biodegradable

Solution

Domestic waste is biodegradable in nature. They are simply broken down into simpler substance due to action of microbes.
Question 5
1 / -0

Acid rain is due to

A
Water pollution

B
Air pollution

C
Pesticide pollution

D
Automobile 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 6
1 / -0

Eutrophication of water body occurs due to addition of

A
Only fertilizers

B
Only detergents

C
Only sewage

D
Detergents, fertilizers and sewage.

Solution

Eutrophication is the enrichment of an ecosystem with chemical nutrients, typically compounds containing nitrogen, phosphorus, or both.

Eutrophication can be a natural process in lakes, occurring as they age through geological time.

Human activities can accelerate the rate at which nutrients enter ecosystems.

Eutrophication of water body occurs due to addition of detergents, fertilizers and untreated sewage.
Question 7
1 / -0

Terrestrial life would become impossible with

A
Change in orbit of earth

B
Disappearance of moon

C
Decrease in mean annual temperature by 100 C.

D
Change in atmosphere permitting all solar radiations to reach lithosphere

Solution

Terrestrial life would become impossible with change in atmosphere permitting all solar radiations to reach lithosphere. Solar radiations are essential for food preparation that supports the aquatic life.
Question 8
1 / -0

Minamata disease is due to pollution of

A
Arsenic into the atmosphere

B
Oil spill in water

C
Organic waste into drinking water.

D
Industrial waste mercury into fishing water.

Solution

Minamata is known due to Minamata disease, a neurological disorder caused by mercury poisoning. The disease was discovered in 1956. A local chemical plant was blamed for causing the disease by emitting untreated wastewater to the Minamata Bay.

MInamata disease is severe mercury poisoning that cause ataxia, numbness in hands and feet.
Question 9
1 / -0

Addition of phosphates and nitrates/fertilizers into water leads to

A
Nutrient enrichment /eutrophication.

B
Reduced algal growth

C
Decrease Water Pollution

D
Increased growth of decomposers

Solution

Eutrophication /Nutrient enrichment is the enrichment of an ecosystem with chemical nutrients, typically compounds containing nitrogen, phosphorus, or both.

because of eutrophication large number of microbes grows rapidly and consume oxygen present in water.
Question 10
1 / -0

In pollution, the term synergism is used for

A
Decreasing effect to degradable pollutant.

B
Formation of more potent secondary pollutant from primary pollutant.

C
Biomagnifications of non-biodegradable pollutants.

D
Dangerous effect when two pollutants are present together.

Solution

Synergism refers to the effect caused when exposure to two or more chemicals at as time results in health effects that are greater than the sum of the effects of the individual chemicals.

In pollution, the term synergism is used for formation of more potent secondary pollutant from primary pollutant. In this process two pollutant reacts together to form more harmful pollutant in air and water.

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Re-Attempt Weekly Quiz Competition

Environmental Issues Test - 6

Result

Environmental Issues Test - 6

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SHARING IS CARING

Question 1

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 2

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 3

Decrease

Remain unchanged

Slightly decrease

Increase

Solution

Question 4

Air pollutant

Effluent

Non-biodegradable

Biodegradable

Solution

Question 5

Water pollution

Air pollution

Pesticide pollution

Automobile pollution

Solution

Question 6

Only fertilizers

Only detergents

Only sewage

Detergents, fertilizers and sewage.

Solution

Question 7

Change in orbit of earth

Disappearance of moon

Decrease in mean annual temperature by 100 C.

Change in atmosphere permitting all solar radiations to reach lithosphere

Solution

Question 8

Arsenic into the atmosphere

Oil spill in water

Organic waste into drinking water.

Industrial waste mercury into fishing water.

Solution

Question 9

Nutrient enrichment /eutrophication.

Reduced algal growth

Decrease Water Pollution

Increased growth of decomposers

Solution

Question 10

Decreasing effect to degradable pollutant.

Formation of more potent secondary pollutant from primary pollutant.

Biomagnifications of non-biodegradable pollutants.

Dangerous effect when two pollutants are present together.

Solution

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