Environmental Chemistry Test

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Environmental Chemistry Test - 1

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Weekly Quiz Competition

Question 1
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Inadequate pollution control equipments result in the :

A
Release of greater amount of NO₂

B
Release of greater amount of SO₂

C
release of greater amount of NO

D
Release of greater amount of CO

Solution

Explanation:

Inadequate pollution control equipments release greater amount of carbon monoxide that increases the pollution even further.
Question 2
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Carbon monoxide is poisonous to human beings because :

A
Results in tears and redness

B
It binds to haemoglobin and eventually produces oxygen deficiency

C
Acute respiratory disease

D
They are carcinogenic

Solution

Explanation:

CO has more affinity to bind to Hb than oxygen. So it blocks the binding of oxygen to Hb causing deficiency of it and can lead to death.
Question 3
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Hydrocarbons are formed by :

A
Combustion of fuel in automobiles, at high temperatures

B
Incomplete combustion of fuel used in automobiles

C
Complete combustion of fossil fuel

D
Complete combustion of carbon

Solution

Explanation:

Hydrocarbons are formed by incomplete combustion of fossil fuels used in automobiles. When they undergo incomplete combustion, they are partially oxidised and produce other fragments of hydrocarbons along with CO and C.
Question 4
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Nitrogen dioxide (NO₂) causes :

A
Acute respiratory disease

B
Skin itching

C
Ageing

D
Results in tears and redness

Solution

Explanation:

Nitrogen dioxide is responsible for acute respiratory disease in children. It also causes irritating red haze in traffic and congested places, damages leaves of plants, retard rate of photosynthesis, toxicity to living tissues and harm to textile fibres and metals.
Question 5
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Sewage containing organic waste should not be disposed in water bodies because it causes major water pollution. Fishes in such a polluted water bodies die because of :

A
Large number of mosquitoes

B
Clogging of gills by mud

C
Decrease in the amount of dissolved oxygen in water

D
Increase in the amount of dissolved oxygen

Solution

Explanation:

Organic waste disposed in water bodies causes the death of fishes because bacteria present in them decompose the organic waste and consume oxygen in it leaving lesser oxygen for fishes and other aquatic animals for respiration.
Question 6
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Acid rain is :

A
Much water vapours

B
Deposition of water polluted by toxic heavy metal residues on earth

C
Deposition of organic wastes on earth

D
Deposition of acidic gaseous pollutants on earth from the atmosphere

Solution

Explanation:

The acidic gaseous pollutants like oxides of sulphur and nitrogen react with water and come down to earth in form of acid rain.
Question 7
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Tropospheric pollution is caused by :

A
Cloud formation and turbulence

B
Dinitrogen and dioxygen gases

C
Chlorofluorocarbons (freons)

D
Oxides of sulphur, nitrogen and carbon

Solution

Explanation:

Various oxides of sulphur, nitrogen and carbon like SO₂, SO₃, NO, NO₂, CO and CO₂ cause tropospheric pollution and inflict harm to living beings.
Question 8
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Troposphere is a region of the atmosphere which contains :

A
Human beings

B
dinitrogen and dioxygen gases

C
Little water vapours

D
Ozone layer

Solution

Explanation:

Troposphere is the lowest layer of the atmosphere where all living beings including humans live. It also has air, much water vapours, clouds and is turbulent in nature.
Question 9
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Stratosphere is a region of the atmosphere which contains :

A
Water vapour and clouds

B
Ozone layer

C
Air

D
Plants

Solution

Explanation:

Stratosphere, which is the second layer of atmosphere, contains ozone layer that absorbs UV-radiation from sun's rays.
Question 10
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Carbon monoxide is one of the most dangerous air pollutants and is produced as a result of :

A
Incomplete combustion of carbon, firewood, petrol

B
Combustion of fuel in automobiles at high temperatures

C
Complete combustion of fuel used in automobiles

D
Complete combustion of fossil fuel

Solution

Explanation:

Carbon monoxide is produced by incomplete combustion of carbon, firewood, petrol.

The reaction is as follows :

2C + O₂ -----> 2CO

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Environmental Chemistry Test - 1

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Environmental Chemistry Test - 1

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SHARING IS CARING

Question 1

Release of greater amount of NO2

Release of greater amount of SO2

release of greater amount of NO

Release of greater amount of CO

Solution

Question 2

Results in tears and redness

It binds to haemoglobin and eventually produces oxygen deficiency

Acute respiratory disease

They are carcinogenic

Solution

Question 3

Combustion of fuel in automobiles, at high temperatures

Incomplete combustion of fuel used in automobiles

Complete combustion of fossil fuel

Complete combustion of carbon

Solution

Question 4

Acute respiratory disease

Skin itching

Ageing

Results in tears and redness

Solution

Question 5

Large number of mosquitoes

Clogging of gills by mud

Decrease in the amount of dissolved oxygen in water

Increase in the amount of dissolved oxygen

Solution

Question 6

Much water vapours

Deposition of water polluted by toxic heavy metal residues on earth

Deposition of organic wastes on earth

Deposition of acidic gaseous pollutants on earth from the atmosphere

Solution

Question 7

Cloud formation and turbulence

Dinitrogen and dioxygen gases

Chlorofluorocarbons (freons)

Oxides of sulphur, nitrogen and carbon

Solution

Question 8

Human beings

dinitrogen and dioxygen gases

Little water vapours

Ozone layer

Solution

Question 9

Water vapour and clouds

Ozone layer

Air

Plants

Solution

Question 10

Incomplete combustion of carbon, firewood, petrol

Combustion of fuel in automobiles at high temperatures

Complete combustion of fuel used in automobiles

Complete combustion of fossil fuel

Solution

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Release of greater amount of NO₂

Release of greater amount of SO₂