Environment issue Test

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Environment issue Test - 6

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Weekly Quiz Competition

Question 1
1 / -0

Which of the following radioactive medical wastes poses the greatest risk to health?

A
Co-60

B
Cs-137

C
Ir-192

D
Sr-89

Solution

Cesium-137 poses the maximum risk to human health as it has the maximum half life as compared to others. Cs-137 is used for brachytherapy and has a half life of 30 years.
Question 2
1 / -0

What happens to DDT once it is consumed by the cattle?

A
It is secreted out in urine.

B
It is stored in liver.

C
It is stored in fatty tissues.

D
It is stored in muscles.

Solution

DDT is stored in fatty tissues of animals. It produces no known toxic effect while it is stored in the fat.
Question 3
1 / -0

Choose the correct alternative from the following options.

A: Antarctic ozone depletion is least during spring.
B: Sunlight plays a major role in ozone depletion.

A
Both A and B are true and B is the correct explanation of A.

B
Both A and B are true but B is not the correct explanation of A.

C
A is true but B is false.

D
A is false but B is true.

Solution

A is false but B is true. Antarctic ozone depletion is greatest during spring. During the spring, the Sun comes out, providing energy to drive photochemical reactions and melts the polar stratospheric clouds, releasing considerable ClO (Chlorine monoxide), which drives the hole mechanism.
Question 4
1 / -0

What is the thickness of layer of ozone formed by a typical column of 300 Dobson units of atmospheric zone?

A
3 mm

B
30 mm

C
0.3 mm

D
300 mm

Solution

One Dobson unit is equal to the number of ozone molecules needed to create a pure layer of ozone 0.01 millimeters thick at STP. Therefore, 300 Dobson units will create 300 x 0.01 = 3 mm thickness of layer of ozone.
Question 5
1 / -0

How does the presence of nitrogen oxides in the air affect humans?

A
It makes children susceptible to respiratory diseases in the winters.

B
It impairs concentration, slows reflexes and makes children confused.

C
It leads to diseases of the lung and other lung disorders.

D
It makes eyes itch, burn and water and lowers resistance to pneumonia.

Solution

Presence of nitrogen oxides in the air makes children susceptible to respiratory diseases in the winters.
Question 6
1 / -0

Which of the following compounds has the maximum ozone depleting potential (ODP)?

A
Dichlorodifluoromethane

B
Bromochlorodifluoromethane

C
Carbon tetrachloride

D
Chlorodifluoromethane

Solution

Bromochlorodifluoromethane has the maximum ODP. It is equal to 7.9.
Question 7
1 / -0

Which of the following air pollution control devices helps prevent the formation of acid rain?

A
Scrubber

B
Cyclone separator

C
Electronic precipitator

D
Gravity settlers

Solution

Scrubbers remove gaseous pollutants from flue. By removing acidic gases from the exhaust before they are released into the sky, scrubbers help prevent the formation of acid rain.
Question 8
1 / -0

What role do incinerators play in air pollution control devices?

A
They convert unburnt hydrocarbons into carbon dioxide and water.

B
They convert VOC (volatile organic compound) emissions into carbon dioxide and water.

C
They perform flue gas desulphurisation.

D
They remove particulate matter from gas by combustion.

Solution

Incineration is used to convert VOC emissions into carbon dioxide and water through combustion.
Question 9
1 / -0

Which of the following metals is not used in catalytic converters to treat unburnt hydrocarbons?

A
Palladium

B
Platinum

C
Plutonium

D
Rhodium

Solution

Plutonium is not used as a catalyst in catalytic converters because it is a highly dangerous and poisonous element. It rapidly gives off radiation in the form of alpha particles.
Question 10
1 / -0

Higher content of nitrogen oxides in air is associated with

A
necrosis of leaves

B
chlorosis of leaves

C
both chlorosis and necrosis of leaves

D
yellowing of leaves

Solution

Higher concentration of nitrogen oxides in the air is associated with chlorosis of leaves.

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Environment issue Test - 6

Result

Environment issue Test - 6

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SHARING IS CARING

Question 1

Co-60

Cs-137

Ir-192

Sr-89

Solution

Question 2

It is secreted out in urine.

It is stored in liver.

It is stored in fatty tissues.

It is stored in muscles.

Solution

Question 3

Both A and B are true and B is the correct explanation of A.

Both A and B are true but B is not the correct explanation of A.

A is true but B is false.

A is false but B is true.

Solution

Question 4

3 mm

30 mm

0.3 mm

300 mm

Solution

Question 5

It makes children susceptible to respiratory diseases in the winters.

It impairs concentration, slows reflexes and makes children confused.

It leads to diseases of the lung and other lung disorders.

It makes eyes itch, burn and water and lowers resistance to pneumonia.

Solution

Question 6

Dichlorodifluoromethane

Bromochlorodifluoromethane

Carbon tetrachloride

Chlorodifluoromethane

Solution

Question 7

Scrubber

Cyclone separator

Electronic precipitator

Gravity settlers

Solution

Question 8

They convert unburnt hydrocarbons into carbon dioxide and water.

They convert VOC (volatile organic compound) emissions into carbon dioxide and water.

They perform flue gas desulphurisation.

They remove particulate matter from gas by combustion.

Solution

Question 9

Palladium

Platinum

Plutonium

Rhodium

Solution

Question 10

necrosis of leaves

chlorosis of leaves

both chlorosis and necrosis of leaves

yellowing of leaves

Solution

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