Environmental Studies · General Awareness

Greenhouse Gases and Atmosphere

1,328 Questions

Review important questions related to greenhouse gases, global warming, and atmospheric changes. The practice set focuses on identifying major pollutants and their environmental impact. These concepts are tested in the general awareness and environmental studies sections.

Greenhouse gas identificationGlobal warming processAtmospheric carbon dioxideMethane emissionsCement production emissions

Greenhouse Gases and Atmosphere Questions

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

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

  1. $CO _2$
  2. $CH _4$
  3. $O _2$
  4. $O _3$
Reveal answer Fill a bubble to check yourself
C Correct answer
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.

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

Which of the given option is not correct?

  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
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Option A is correct in context, but the question asks for the 'not correct' statement. Option D is incorrect because the greenhouse effect causes sea levels to rise due to melting ice and thermal expansion, not by lowering ocean levels through evaporation.

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

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.

  1. A and B

  2. B and D

  3. C and B

  4. D and A
Reveal answer Fill a bubble to check yourself
B Correct answer
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.

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

Green house effect is caused by :

  1. $NO _2$
  2. $CO$
  3. $NO$
  4. $CO _2$
Reveal answer Fill a bubble to check yourself
D Correct answer
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 $CO _2$.
Multiple choice chemistry air and water pollution control environmental impact: global warming green house effect geobiochemical cycle

Gases referred as 'greenhouse gases' are:

  1. $CO _2,\ O _2,\ NO _2,\ NH _3$
  2. chlorofluorocarbon, $CO _2,\ NH _3,\ N _2O$
  3. $CH _4,\ N _2,\ CO _2,\ NH _3$
  4. chlorofluorocarbon, $CO _2,\ CH _4,\ N _2O$
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The most significant greenhouse gases are water vapour (H$ _2$O), carbon dioxide (CO$ _2$), methane (CH$ _4$) and nitrous oxide (N$ _2$O). Chlorofluorocarbons (CFCs), once used as refrigerants and aerosol propellants until they were phased out by international agreement, are also greenhouse gases.

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

Which of the following is not a green house gas?

  1. Carbon dioxide

  2. Water vapour

  3. Oxygen

  4. Methane
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Green house gases (GHGs) are gaseous components of the atmosphere that contribute to the 'green house effect'. A greenhouse gas is any gaseous compound in the atmosphere that is capable of absorbing infrared radiation, thereby trapping and holding heat in the atmosphere. By increasing the heat in the atmosphere, greenhouse gases are responsible for the greenhouse effect, which ultimately leads to global warming. Some greenhouse gases occur naturally in the atmosphere, while others result from human activities. Naturally occurring greenhouse gases include water vapour, carbon dioxide, methane, nitrous oxide and ozone. Certain human activities, however, add to the levels of most of these naturally occurring gases.

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

Which of the following gasses contribute to greenhouse effect?

  1. $CO _2$
  2. $CH _4$
  3. $CFC$s

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Green house causes the greenhouse effect. The primary greenhouse gases in Earth's atmosphere are carbon dioxide, methane, nitrous oxide and ozone.


Chlorofluorocarbons (CFCs) are also a greenhouse gases.

So, the correct option is $D$

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

Which of the following is a greenhouse gas?

  1. Nitrogen

  2. Oxygen

  3. Ozone

  4. Helium
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A greenhouse gas is a gas in an atmosphere that absorbs and emits radiation within the thermal infrared range. This process is the fundamental cause of the greenhouse effect. The primary greenhouse gases in Earth's atmosphere are water vapour, carbon dioxide, methane, nitrous oxide, and ozone. 

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

Greenhouse gases cause:

  1. ocean acidification

  2. ozone depletion

  3. smog pollution

  4. all of above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Increases in the different greenhouse gases have other effects apart from global warming, including ocean acidification (by acid rain), smog pollution (contaminated particles in air) and ozone depletion as well as changes to plant growth and nutrition levels.