Environmental Chemistry Test

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Environmental Chemistry Test - 33

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Weekly Quiz Competition

Question 1
1 / -0

Waste from industries are

A
Metal scraps

B
Chemical sludge

C
Acids

D
All of the above

Solution

Some of the commonly produced industrial wastes are boiler ash, metal scraps, chemical sludge, packing waster, acids, alkalies, poisonous dyes, oils etc
Question 2
1 / -0

The acidity in the rain is due to the presence of:

A
$$\displaystyle { H }_{ 2 }{ SO }_{ 4 }$$

B
$$\displaystyle { H }_{ 2 }{ SO }_{ 3 }$$

C
$$\displaystyle { HNO }_{ 3 }\\ $$

D
all of the above

Solution

The pollutants in the atmosphere like $$ { SO }_{ 2 },\ { NO }_{ 2 }\ and\ { CO }_{ 2 } $$ (known as sulphur dioxide, nitrogen dioxide and carbon dioxide) are present in atmosphere due to industrial and vehicular pollution. They combine with rain water to form sulphuric acid ($$ { H }_{ 2 }SO_{ 4 } $$) , nitric acid ($$ { H }{ NO }_{ 3 } $$) and carbonic acid ($$ { H }_{ 2 }{ CO }_{ 3 } $$) respectively. Equations are as follows:
$$ { H }_{ 2 }O\quad +\quad { SO }_{ 2 }\quad \quad \rightarrow \quad { H }_{ 2 }{ SO }_{ 3 } $$ (Sulphurous acid)
$$ { H }_{ 2 }O\quad +\quad { SO }_{ 3 }\quad \quad \rightarrow \quad { H }_{ 2 }{ SO }_{ 4 } $$ (Sulphuric acid)
$$ { H }_{ 2 }O\quad +\quad { NO }_{ 2 }\quad \quad \rightarrow \quad { H }{ NO }_{ 3 } $$ (Nitric acid)
$$ { H }_{ 2 }O\quad +\quad { CO }_{ 2 }\quad \quad \rightarrow \quad { H }_{ 2 }{ CO }_{ 3 } $$ (Carbonic acid)
Question 3
1 / -0

Which of the following reaction is not correct during the formation of acid rain?

A
$$\displaystyle S+{ O }_{ 2 }\rightarrow { SO }_{ 2 }$$

B
$$\displaystyle { H }_{ 2 }O+{ SO }_{ 2 }\rightarrow { H }_{ 2 }{ SO }_{ 3 }$$

C
$$\displaystyle { H }_{ 2 }O+{ SO }_{ 2 }\rightarrow { H }_{ 2 }{ SO }_{ 4 }$$

D
$$\displaystyle 2{ SO }_{ 2 }+{ O }_{ 2 }\rightarrow 2{ SO }_{ 3 }$$

Solution

$$\displaystyle { H }_{ 2 }O+{ SO }_{ 2 }\rightarrow { H }_{ 2 }{ SO }_{ 4 }$$ is the incorrect.
$${ H }_{ 2 }O+{ SO }_{ 3 }\rightarrow { H }_{ 2 }{ SO }_{ 4 }$$ is the correct reaction.
Question 4
1 / -0

Which of the following reactions is not correct for the formation of acid rain?

A
$$\displaystyle { N }_{ 2 }+{ O }_{ 2 }\rightarrow 2NO$$

B
$$\displaystyle 2NO+{ O }_{ 2 }\rightarrow { 2NO }_{ 2 }$$

C
$$\displaystyle { H }_{ 2 }O+2{ NO }_{ 2 }\rightarrow { HNO }_{ 2 }+{ HNO }_{ 3 }$$

D
$$\displaystyle NO+{ O }_{ 2 }\rightarrow { NO }_{ 2 }$$

Solution

$$\displaystyle NO+{ O }_{ 2 }\rightarrow { NO }_{ 2 }$$ is the incorrect equation as it is not balanced.
Question 5
1 / -0

Which of the following is/are damages caused by acid rain?

A
It depletes the nutrients of the soil, increases the acidity of the soil, and reduces fertility.

B
It destroys marine life due to change in pH of the environment.

C
It causes material damage.

D
All of the above
Solution
The damages caused by acid rain are:
It depletes the nutrients of the soil, increases the acidity of the soil, and reduces fertility. These conditions lead to suppressed plant growth.
It destroys marine life due to changes in the pH of the environment, making it unfit for habitation by aquatic animals.
It causes material damage such as corrosion of marbles.
Question 6
1 / -0

Which of the following chemicals is responsible for the depletion of ozone layer in the atmosphere?

A
Sulphur dioxide

B
Nitrous oxide

C
Chlorofluorocarbons

D
Carbon dioxide

Solution

Chlorofluorocarbons (CFCs) are nontoxic, nonflammable chemicals containing atoms of carbon, chlorine, and fluorine. They are used in the manufacture of aerosol sprays, blowing agents for foams and packing materials, as solvents, and as refrigerants.
CFCs have destructive effects on the ozone layer.
Question 7
1 / -0

Ozone is an air pollutant that is a major component of:

A
smog

B
smoke

C
dust

D
dirt particles

Solution

At ground level, ozone is an air pollutant that is a major component of smog which is dangerous for both humans and plants. Long-term ozone exposure has also been shown to reduce life expectancy.
Question 8
1 / -0

Which is always present in photochemical smog?

A
$$O_3$$

B
$$CO_2$$

C
$$SO_2$$

D
$$CH_4$$

Solution

Photochemical smog is formed from secondary pollutants. Secondary pollutants are formed due to the reaction between solar radiation and primary pollutants like nitrogen dioxide. Nitrogen oxides split into nitric oxide and nascent oxygen. Nascent oxygen forms ozone. Ozone, nitric oxide and PAN are the secondary pollutants
So, the correct answer is '$$O_3$$'
Question 9
1 / -0

Industrial waste includes waste from

A
Factories and mills

B
Dairy

C
Sea

D
None of the above

Solution

Industrial waste is the waste produced by industrial activity which includes any material that is rendered useless during a manufacturing process such as that of factories, industries, mills and mining operations. It has existed since the start of the industrial revolution. Some examples of industrial wastes are chemical solvents, paints, sandpaper, paper products, industrial by-products, metals and radioactive wastes.
Question 10
1 / -0

Which one of the following is mainly responsible for depletion of ozone layer?

A
Methane

B
Carbon dioxide

C
Water

D
Chlorofluorocarbons

Solution

The ozone layer present in the stratosphere acts as a protective shield. It saves the earth from the harmful ultraviolet rays of the sun. The compounds containing CFCs (chlorofluorocarbons) deplets ozone layer when these compounds react with ozone in the presence of ultraviolet rays to form oxygen molecule.
Chlorofluorocarbons are released into the atmosphere due to cleaning agents. Coolants in refrigerators and air conditioners, aerosol spray cans etc. Hence, the correct answer is option D.

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Re-Attempt Weekly Quiz Competition

Environmental Chemistry Test - 33

Result

Environmental Chemistry Test - 33

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SHARING IS CARING

Question 1

Metal scraps

Chemical sludge

Acids

All of the above

Solution

Question 2

$$\displaystyle { H }_{ 2 }{ SO }_{ 4 }$$

$$\displaystyle { H }_{ 2 }{ SO }_{ 3 }$$

$$\displaystyle { HNO }_{ 3 }\\ $$

all of the above

Solution

Question 3

$$\displaystyle S+{ O }_{ 2 }\rightarrow { SO }_{ 2 }$$

$$\displaystyle { H }_{ 2 }O+{ SO }_{ 2 }\rightarrow { H }_{ 2 }{ SO }_{ 3 }$$

$$\displaystyle { H }_{ 2 }O+{ SO }_{ 2 }\rightarrow { H }_{ 2 }{ SO }_{ 4 }$$

$$\displaystyle 2{ SO }_{ 2 }+{ O }_{ 2 }\rightarrow 2{ SO }_{ 3 }$$

Solution

Question 4

$$\displaystyle { N }_{ 2 }+{ O }_{ 2 }\rightarrow 2NO$$

$$\displaystyle 2NO+{ O }_{ 2 }\rightarrow { 2NO }_{ 2 }$$

$$\displaystyle { H }_{ 2 }O+2{ NO }_{ 2 }\rightarrow { HNO }_{ 2 }+{ HNO }_{ 3 }$$

$$\displaystyle NO+{ O }_{ 2 }\rightarrow { NO }_{ 2 }$$

Solution

Question 5

It depletes the nutrients of the soil, increases the acidity of the soil, and reduces fertility.

It destroys marine life due to change in pH of the environment.

It causes material damage.

All of the above

Solution

Question 6

Sulphur dioxide

Nitrous oxide

Chlorofluorocarbons

Carbon dioxide

Solution

Question 7

smog

smoke

dust

dirt particles

Solution

Question 8

$$O_3$$

$$CO_2$$

$$SO_2$$

$$CH_4$$

Solution

Question 9

Factories and mills

Dairy

Sea

None of the above

Solution

Question 10

Methane

Carbon dioxide

Water

Chlorofluorocarbons

Solution

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