Environmental Chemistry Test

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Environmental Chemistry Test - 2

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Weekly Quiz Competition

Question 1
1 / -0

Which of the following atmospheric pollutants can cause anoxia?

A
NO

B
SO₂

C
CO₂

D
CO
Question 2
1 / -0

Inhaling _________ in large amounts can cause pulmonary edema.

A
NO

B
H₂S

C
SO₂

D
CO₂
Question 3
1 / -0

Which of the following is not regarded as an achievement of green chemistry?

A
Development of dense-phase carbon dioxide

B
Development of fuel cells

C
Development of oxidative cracking process

D
None of these
Question 4
1 / -0

A considerable part of the harmful UV radiation of the sun does not reach the surface of Earth because of the formation of ozone in the stratosphere. However, a continuous decrease in the ozone levels has raised serious environmental issues because of the leaking in of the ultraviolet radiation into the Earth's atmosphere. Which of the following statements in this context is not true?

A
Ozone is formed in the stratosphere when oxygen molecules photodissociate after taking in ultraviolet photons.

B
Chlorofluorocarbons are highly reactive molecules and break down in the troposphere to release free radicals that destroy the ozone molecules.

C
Ozone is a highly reactive molecule that easily reduces to the more stable oxygen form with the assistance of a catalyst.

D
Reactions that take place on polar stratospheric clouds (PSCs) play an important role in enhancing ozone depletion.
Question 5
1 / -0

Which of the following pollutants can degrade by natural processes :

A
Majority of chemicals

B
Vegetables

C
Nuclear waste

D
Refrigerant materials

Solution

Vegetables have cell walls made up of cellulose which is a natural polymer and thus is bio-degradable, so they breakdown by natural processes.
Question 6
1 / -0

Which of the following is/are not a component(s) of photochemical smog?

A
Unsaturated hydrocarbons

B
Nitrogen dioxide

C
Ozone

D
Sulphur dioxide
Question 7
1 / -0

Release of CFCs is also known as

A
freon

B
depletion

C
Contamination

D
All of the above
Question 8
1 / -0

Chlorine gas was used earlier for bleaching paper. Nowadays, it is being replaced by

A
ethanal with suitable catalyst

B
hydrogen peroxide with suitable catalyst

C
tetrachloroethene with suitable catalyst

D
ethene with suitable catalyst
Question 9
1 / -0

The brown haze of photochemical smog is largely attributed to

A
CO

B
NO₂

C
SO₂

D
HCl
Question 10
1 / -0

Dichloro-diphenyl-trichloro-ethane (DDT), plastic materials, heavy metals etc. belong to which of the following category of pollutants in environment :

A
Non-biodegradable

B
Bio-degradable

C
Slowly degradable

D
None of the above

Solution

DDT, plastic materials and heavy metals like cadmium, mercury and arsenic are not degradable by natural biological processes by bacteria or any other microbe. Therefore they are non-biodegradable.

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Environmental Chemistry Test - 2

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Environmental Chemistry Test - 2

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Question 1

NO

SO2

CO2

CO

Question 2

NO

H2S

SO2

CO2

Question 3

Development of dense-phase carbon dioxide

Development of fuel cells

Development of oxidative cracking process

None of these

Question 4

Ozone is formed in the stratosphere when oxygen molecules photodissociate after taking in ultraviolet photons.

Chlorofluorocarbons are highly reactive molecules and break down in the troposphere to release free radicals that destroy the ozone molecules.

Ozone is a highly reactive molecule that easily reduces to the more stable oxygen form with the assistance of a catalyst.

Reactions that take place on polar stratospheric clouds (PSCs) play an important role in enhancing ozone depletion.

Question 5

Majority of chemicals

Vegetables

Nuclear waste

Refrigerant materials

Solution

Question 6

Unsaturated hydrocarbons

Nitrogen dioxide

Ozone

Sulphur dioxide

Question 7

freon

depletion

Contamination

All of the above

Question 8

ethanal with suitable catalyst

hydrogen peroxide with suitable catalyst

tetrachloroethene with suitable catalyst

ethene with suitable catalyst

Question 9

CO

NO2

SO2

HCl

Question 10

Non-biodegradable

Bio-degradable

Slowly degradable

None of the above

Solution

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SO₂

CO₂

H₂S

SO₂

CO₂

NO₂

SO₂