Environmental Chemistry Test

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Environmental Chemistry Test - 40

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Question 1
1 / -0

$$Statement\ I-$$ Algal blooms, caused by phosphates, are beneficial to aquatic ecosystems.
BECAUSE
$$Statement\ II-$$ Algal blooms are associated with rapidly increasing rates of photosynthesis which lead to dissolve oxygen content in the water leading to much higher than normal levels.

A
Statement $$I$$ is true, Statement $$II$$ is true

B
Statement $$I$$ is true, Statement $$II$$ is false

C
Statement $$I$$ is false, Statement $$II$$ is true

D
Statement $$I$$ is false, Statement $$II$$ is false

E
Statement $$I$$ is true, Statement $$II$$ is true and is correct explanation of the phenomena described in $$I$$
Question 2
1 / -0

Ozone in the stratosphere is depleted by

A
$$C_6F_6Cl_6$$

B
$$C_7F_{16}$$

C
$$CF_2Cl_2$$

D
$$C_6F_6$$
Solution
Correct answer: C
Explanation:
- The presence of CFCs in the atmosphere results in the depletion of the ozone layer. The chemical formula of this substance is CF$$_2$$Cl$$_2$$.
- They are used as coolants in refrigerators, coolers, etc.
- The CFCs causes the breaking of the ozone molecule which forms the oxygen radical and O$$_2$$.
- The depletion of the ozone layer results in the penetration of harmful UV radiation from the sun into the Earth's atmosphere.
Question 3
1 / -0

Photochemical smog is the chemical reaction of sunlight, nitrogen oxides and volatile ________ compounds in the atmosphere, which leaves airborne particles and ground-level ozone.

A
hydrocarbons

B
inorganic compounds

C
sulphates

D
carbonates

Solution

Photochemical smog is the chemical reaction of sunlight, nitrogen oxides and volatile organic compounds in the atmosphere, which leaves airborne particles and ground-level ozone.
Hence option A is the correct answer.
Question 4
1 / -0

Which of the following is/are type(s) of smog?

A
Classical smog

B
Photochemical smog

C
Both $$A$$ and $$B$$

D
None of the above

Solution

Smog is two types:-
1) Classical smog is also called as London smog or sulphurous acid smog.
2) Photochemical smog is also called as Los angles smog.
Question 5
1 / -0

What is so important about the troposphere?

A
Layer of water at or near Earths surface

B
Contains ozone

C
It contains weather and the oxygen that we breath

D
All of the above

Solution

The troposphere is the lowest portion of earth's atmosphere and is also where all weather takes place. It contains approximately 75% of the atmosphere's mass and 99% of its water vapour and aerosols.
Question 6
1 / -0

Photochemical smog is also called as____________.

A
London Smog

B
sulphurous acid smog

C
Both $$A$$ and $$B$$

D
Los angles smog

Solution

Smog is two types:
1) Classical smog is also called as London smog or sulphurous acid smog.
2) Photochemical smog is also called as Los angles smog.
Hence option D is correct.
Question 7
1 / -0

Classical smog is also called as________.

A
London smog

B
sulphurous acid smog

C
Both $$A$$ and $$B$$

D
Los angles smog

Solution

Smog is two types:
1) Classical smog is also called as London smog or sulphurous acid smog.
2) Photo chemical smog is also called as Los angles smog.
Question 8
1 / -0

Those gases or particles that are pumped into the air to make it unclean are called ______.

A
primary air pollutant

B
secondary air pollutant

C
teritiary air pollutant

D
none of above

Solution

Primary pollutants are those gases or particles that are pumped into the air to make it unclean. They include carbon monoxide from automobile (cars) exhausts and sulphur dioxide from the combustion of coal.
Question 9
1 / -0

Which of the following is a pollutant?

A
Sooty particle

B
Sulpur-dioxide

C
Carbon-monoxide

D
All of above.

Solution

Pollutant is a substance that pollutes something, especially water or the atmosphere.
Examples are particulate matter (Sooty particles that are most toxic when they are small),sulphur dioxide,carbon-monoxide etc.
Question 10
1 / -0

Inorganic wastes may include _____.

A
Mercury

B
Arsenic

C
Cadmium

D
All of these

Solution

Wastes which consist of materials that are non-biodegradable so their destruction takes a very long time are known as inorganic wastes. Inorganic waste comes from non-renewable natural resources such as minerals and petroleum, or from industrial processes. They are only slightly affected by the action of organisms. They include waste materials such as sand, salt, Iron, Calcium, Mercury, Arsenic, Cadmium, etc.

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Environmental Chemistry Test - 40

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Environmental Chemistry Test - 40

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Question 1

Statement $$I$$ is true, Statement $$II$$ is true

Statement $$I$$ is true, Statement $$II$$ is false

Statement $$I$$ is false, Statement $$II$$ is true

Statement $$I$$ is false, Statement $$II$$ is false

Statement $$I$$ is true, Statement $$II$$ is true and is correct explanation of the phenomena described in $$I$$

Question 2

$$C_6F_6Cl_6$$

$$C_7F_{16}$$

$$CF_2Cl_2$$

$$C_6F_6$$

Solution

Question 3

hydrocarbons

inorganic compounds

sulphates

carbonates

Solution

Question 4

Classical smog

Photochemical smog

Both $$A$$ and $$B$$

None of the above

Solution

Question 5

Layer of water at or near Earths surface

Contains ozone

It contains weather and the oxygen that we breath

All of the above

Solution

Question 6

London Smog

sulphurous acid smog

Both $$A$$ and $$B$$

Los angles smog

Solution

Question 7

London smog

sulphurous acid smog

Both $$A$$ and $$B$$

Los angles smog

Solution

Question 8

primary air pollutant

secondary air pollutant

teritiary air pollutant

none of above

Solution

Question 9

Sooty particle

Sulpur-dioxide

Carbon-monoxide

All of above.

Solution

Question 10

Mercury

Arsenic

Cadmium

All of these

Solution

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