Environmental Chemistry Test

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Environmental Chemistry Test - 34

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Question 1
1 / -0

The acidity of rain is due to presence of:

A
$$H_2SO_4$$

B
$$H_2SO_3$$

C
$$HCl$$

D
both $$A$$ and $$B$$
Solution
- When oxides of sulfur and nitrogen are emitted by the industries, they combine with the atmospheric moisture to form acids.
- These acids are responsible for the acidic nature and lower pH of the rains.
- Sulfur oxides react with water to form sulfurous acid and sulfuric acid $$(H_2SO_4)$$. These acids are partly responsible for the acidity of rain. The pH of acid rain is 5.5
Hence, the correct answer is option D.
Question 2
1 / -0

Suspended particulate matter like __________ emitted from industries causes yellowing of marble.

A
dust particles

B
acidic gases

C
soot particles

D
all of the above

Solution

Industries like Mathura Oil refinery near Agra emits certain suspended particulate matter like soot particles. This results in yellowing of marble of the monument.
Question 3
1 / -0

Which of the following is not a cause of acid rain?

A
Burning of fossil fuels

B
Bacterial decomposition of organic matter

C
Internal combustion engines

D
None of the above
Solution
The causes of acid rain are:
Burning of fossil fuels
Bacterial decomposition of organic matter
Internal combustion engines
Question 4
1 / -0

Acid rain is caused by emissions of:

A
sulphur dioxide

B
nitrogen dioxide

C
both $$A$$ and $$B$$

D
hydrogen

Solution

Acid rain is a rain or any other form of precipitation that is unusually acidic, meaning that it possesses elevated levels of hydrogen ions (low pH). It can have harmful effects on plants, aquatic animals and infrastructure. Acid rain is caused by emissions of sulfur dioxide and nitrogen oxide, which react with the water molecules in the atmosphere to produce acids.
Question 5
1 / -0

Dobson unit is used in measurement of __________ level.

A
Chlorofluoro carbons

B
Nitrous oxide

C
Ozone

D
UV-B radiation

Solution

A dobson unit is the most basic measure used in ozone research.OneDobson Unit (DU) is defined to be 0.01 mm thickness at STP (standard temperature and pressure). Ozone layer thickness is expressed in terms of Dobson units, which measure what its physical thickness would be if compressed in the Earth's atmosphere
So, the correct answer is 'Ozone'
Question 6
1 / -0

Which of the following negatively affects the plant?

A
Insectisides

B
Pesticides

C
Fertilizers

D
All of the above

Solution
Question 7
1 / -0

Which of the following is a wet deposition of acid rain?

A
Fog

B
Rain

C
Snow

D
All of the above

Solution

Wet deposition is the process in which atmospheric gases or particles are mixed with suspended water in the atmosphere and then washed out through any form of precipitation.
Wet deposition occurs during rain, sleet, snow, or fog.
So the correct answer is option D.
Question 8
1 / -0

Which is among the greatest contributors to gaseous pollutions that are responsible for acidic rain?

A
Electrical power generation using coal

B
Earthquakes

C
Air pollution

D
All of the above

Solution

The principal cause of acid rain is sulfur and nitrogen compounds from human sources, such as electricity generation, factories, and motor vehicles. Electrical power generation using coal is among the greatest contributors to gaseous pollutions that are responsible for acidic rain. The gases can be carried hundreds of kilometers in the atmosphere before they are converted to acids and deposited.
Question 9
1 / -0

Acid rain is caused due to which gas?

A
$$NO_3$$

B
$$SO_2$$

C
$$SO_3$$

D
$$CO_2$$

Solution

The main chemicals in air pollution that create acid rain are sulfur dioxide (SO$$_2$$) and nitrogen (NO$$_2$$). Sulfur dioxide and nitrogen oxides react with water, oxygen, and oxidants and forms sulfuric acid and nitric acid. Sunlight increases the rate of most of these reactions. Rainwater mixed with sulphuric acid and nitric acid is called as acid rain.
Question 10
1 / -0

Directions For Questions

Nitric oxide $$(NO)$$ is the nucleus of photochemical smog.
$$2NO(g) +O_2(air) \to 2NO_2(g)$$
$$NO_2(g) \underrightarrow {Sunlight} NO(g)+[O]$$
$$[O]+O_2(g) \to O_3(g)$$
Both $$NO_2$$ and $$O_3$$ are strong oxidising agents and react with unburnt hydrocarbons on the polluted air to produce formaldehyde, acrolein and perocyacetyl nitrate (PAN). These products are harmful to the plant and animal life.
Catalytic converters are now installed in the automobiles to reduce the photochemical smog. Photochemical smog can also be supressed by certain compounds, which act as free radical trap.

...view full instructions

Primary constituents of photochemical smog are

A
$$SO_2$$ and $$CO$$

B
$$CO_2$$ and $$NO_2$$

C
$$NO_2$$ and hydrocarbons

D
Hydrocarbons and $$CFCs$$

Solution

Photochemical smog is composed of both primary pollutants like the nitrogen oxides and hydrocarbons and the secondary pollutants like the PAN, ozone. Hence, the correct option is C.

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Re-Attempt Weekly Quiz Competition

Environmental Chemistry Test - 34

Result

Environmental Chemistry Test - 34

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SHARING IS CARING

Question 1

$$H_2SO_4$$

$$H_2SO_3$$

$$HCl$$

both $$A$$ and $$B$$

Solution

Question 2

dust particles

acidic gases

soot particles

all of the above

Solution

Question 3

Burning of fossil fuels

Bacterial decomposition of organic matter

Internal combustion engines

None of the above

Solution

Question 4

sulphur dioxide

nitrogen dioxide

both $$A$$ and $$B$$

hydrogen

Solution

Question 5

Chlorofluoro carbons

Nitrous oxide

Ozone

UV-B radiation

Solution

Question 6

Insectisides

Pesticides

Fertilizers

All of the above

Solution

Question 7

Fog

Rain

Snow

All of the above

Solution

Question 8

Electrical power generation using coal

Earthquakes

Air pollution

All of the above

Solution

Question 9

$$NO_3$$

$$SO_2$$

$$SO_3$$

$$CO_2$$

Solution

Question 10

$$SO_2$$ and $$CO$$

$$CO_2$$ and $$NO_2$$

$$NO_2$$ and hydrocarbons

Hydrocarbons and $$CFCs$$

Solution

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