Tag: geobiochemical cycle

Questions Related to geobiochemical cycle

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.

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

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

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

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

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Correct Option: C

Select the correct statements about greenhouse gases:


A. Carbon dioxide is the only gas in the atmosphere which causes global warming.
B. The greenhouse gases trap heat and do not allow heat to escape into outer space.
C. Water vapours do not contribute to the greenhouse effect.
D. The presence of excessive greenhouse gases in the atmosphere is responsible for global warming.

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

  1. A and B

  2. B and D

  3. C and B

  4. D and A

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Correct Option: B
Explanation:

The primary green house gases in earth's atmosphere are water vapour, $CO _2$, $CH _4$, $N _2O$, $O _3$, $CFC$ etc. Thus $CO _2$ is not the only green house gas and water vapours also contribute to global warming.

What is the cause of Green house effect?

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

  1. Infrared rays

  2. Ultraviolet rays

  3. X-rays

  4. Radio waves

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Correct Option: A
Explanation:

Sun gives out UV, infrared and visible radiation gets received by the earth. The incoming solar energy from the sun is redirected back towards space by the atmosphere and clouds and then some of the solar energy gets absorbed by the atmosphere and clouds. And the remaining energy gets absorbed by the Earth’s surface making it warm. This energy then gets converted into heat.

Now once this heat gets absorbed by the earth’s surface, it is trapped in the earth’s atmosphere and thereby adding to increase the earth’s temperature. This effect is what we call the ‘Greenhouse Effect’.

 Thus, Infrared rays are the cause of the Greenhouse effect.

Hence, the correct option is $A$

Green house effect is caused by :

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

  1. $NO _2$

  2. $CO$

  3. $NO$

  4. $CO _2$

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Correct Option: D
Explanation:
The man-made component of the greenhouse effect is caused by man’s activities that emit greenhouse gases to the atmosphere. The most important of these is the burning of fossil fuels. Fossil fuels contain carbon, and when they are burnt this carbon combines with oxygen in the atmosphere to form carbon dioxide.

So, the greenhouse effect is caused by $CO _2$.

The earth gives up .......... energy into atmosphere.

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

  1. light

  2. heat

  3. chemical

  4. wind

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Correct Option: B
Explanation:

Heat radiations from the sun are absorbed by the earth's surface and are reflected back to the atmosphere which is the cause of greenhouse effect.

Which of the following statements is not true?

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

  1. $CO _2$ is the best fire extinguisher

  2. Global warming can cause acid rain

  3. Burning of coal and diesel releases sulphur dioxide gas

  4. LPG has higher calorific value than biogas

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Correct Option: B
Explanation:

Global warming may cause glaciers to melt, which may lead to the rise in sea level and submerge low-lying areas but does not cause acid rain.