Tag: air and water pollution control

Questions Related to air and water pollution control

Green house effect is mainly due to increase in the levels of:

biology air and water pollution control environmental impact: global warming green house effect geobiochemical cycle

  1. $O _{2}$

  2. $CO$

  3. $CO _{2}$

  4. $N _{2}$

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Correct Option: C
Explanation:

A layer of carbon dioxide present in the atmosphere prevents the infrared radiations (reflected by the Earth's surface) from going out in the atmosphere. This heats up the Earth's surface and results in green house effect.

Melting of ice caps may be due to :


a) Depletion of ozone layer
b) Global warming
c) Acid rain

biology air and water pollution control environmental impact: global warming green house effect geobiochemical cycle

  1. a & b

  2. b

  3. c & a

  4. c

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Correct Option: A

The correct match is:

   List - I    List - II
 A.  Freons  1.  Rise in temperature of earth's surface
 B.  Ozone  2.  Forms holes in ozone layer
 C.  Carbon dioxide  3.  Protects life from UV raidation
 D.  Sulphur dioxide  4.  Increase in fluoride ion concentration
     5.  Acid rain
chemistry air and water pollution control environmental impact: global warming green house effect geobiochemical cycle

  1. A-2, B-3, C-1, D-5

  2. A-3, B-4, C-5, D-2

  3. A-1, B-3, C-4, D-2

  4. A-4, B-2, C-1, D-3

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Correct Option: A
Explanation:

Freons are responsible for the hole in ozone layer.
The life is protected from harmful UV radiation by ozone.
The temperature of earths surface rises due to increase in the level of carbon monoxide, as it is a greenhouse gas. 
Sulphur dioxide causes acid rain.

Greenhouse effect is caused by:
i) accumulation of $O _{2}$ in the atmosphere
ii) depletion of $O _{3}$ layer
iii) accumulation of $CO _{2}$ in the atmosphere

chemistry air and water pollution control environmental impact: global warming green house effect geobiochemical cycle

  1. i and ii

  2. i only

  3. iii only

  4. i and iii

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Correct Option: C
Explanation:

Greenhouse effect:

  • The progressive heating up of the surface of the Earth is called the greenhouse effect or global warming.
  • $CO _2$ and $H _2O$ block a part of the heat (IR) emitted by the Earth and reflect it back. Due to this, the Earth's surface gets heated up.
  • 50% of $CO _2$ content of air can increase the surface temperature of the Earth by $3^oC$.
  • In addition to $CO _2$, the other greenhouse gases are $CFC$ (17%), $O _3$ (18%), $NO$ (4%) and water vapour (2%).

The gases associated with the green house effect is:

biology air and water pollution control environmental impact: global warming green house effect geobiochemical cycle

  1. $CO _{2}$

  2. $O _{2}$

  3. methene

  4. $CO$

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Correct Option: A
Explanation:

A greenhouse gas is a gas that absorbs and emits radiant energy within the thermal infrared range. Increasing greenhouse gas emissions cause the greenhouse effect. The primary greenhouse gases in Earth's atmosphere are water vapor, carbon dioxide, methane, nitrous oxide and ozone

Which of the following is a set of green house gases?

chemistry air and water pollution control environmental impact: global warming green house effect geobiochemical cycle

  1. ${\text{C}}{{\text{H}} _{\text{4}}}{\text{,}}{{\text{O}} _{\text{3}}}{\text{,}}{{\text{N}} _{\text{2}}}{\text{,S}}{{\text{O}} _{\text{2}}}$

  2. ${{\text{O}} _3}{\text{,}}{{\text{N}} _2}{\text{,C}}{{\text{O}} _{\text{2}}}{\text{,N}}{{\text{O}} _{\text{2}}}$

  3. ${{\text{O}} _3}{\text{,N}}{{\text{O}} _2}{\text{,S}}{{\text{O}} _{\text{2}}}{\text{,C}}{{\text{l}} _{\text{2}}}$

  4. ${\text{C}}{{\text{O}} _2}{\text{,C}}{{\text{H}} _4}{\text{,}}{{\text{N}} _2}{\text{O,}}{{\text{O}} _3}$

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Correct Option: D

The gas that is not considered as a 'green house gas' is:

chemistry air and water pollution control environmental impact: global warming green house effect geobiochemical cycle

  1. $CO _2$

  2. $CH _4$

  3. $O _2$

  4. $O _3$

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Correct Option: C
Explanation:

The gases in the atmosphere that absorb radiation are known as "greenhouse gases" (sometimes abbreviated as GHG) because they are largely responsible for the greenhouse effect. 


The greenhouse effect, in turn, is one of the leading causes of global warming. 

The most significant greenhouse gases are water vapor (H2O), carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O) and ozone (O3). While oxygen (O2) is the second most abundant gas in our atmosphere, O2 does not absorb thermal infrared radiation to cause greenhouse effect.

Option C is correct.

Which of the following is not a greenhouse gas?

chemistry air and water pollution control environmental impact: global warming green house effect geobiochemical cycle

  1. Hydrogen

  2. Carbon dioxide

  3. Methane

  4. Nitrous oxide

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Correct Option: A

Which of the given option is not correct?

chemistry air and water pollution control environmental impact: global warming green house effect geobiochemical cycle

  1. Greenhouse effect is due to high concentration of $CO _2$ in atmosphere

  2. Green house effect is influenced by gases such a $CH _4, O _3$ and chlorofluoro carbons.

  3. Greenhouse effect is responsible for the warming up of the earth

  4. Greenhouse effect is responsible for lowering the level of occans due to high evaporation

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Correct Option: A

What is the effect of release of $CO _2$ gas on atmosphere?

chemistry air and water pollution control environmental impact: global warming green house effect geobiochemical cycle

  1. Global warming

  2. Photochemical smog

  3. Ozone layer depletion

  4. Tsunami

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Correct Option: A
Explanation:

Solution:- (A) Global warming

Extra $C{O} _{2}$ in the atmosphere increases the greenhouse effect. More thermal energy is trapped by the atmosphere, causing the planet to become warmer than it would be naturally. This increase in the Earth's temperature is known as global warming.