Environmental Studies · General Awareness

Greenhouse Gases and Atmosphere

1,262 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
  1. oxygen

  2. water vapor

  3. carbon dioxide

  4. methane

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

Oxygen makes up about 21 percent of the atmosphere but does not trap heat, so it is not a greenhouse gas. Water vapor, carbon dioxide, and methane are all potent greenhouse gases.

Multiple choice biology global environmental change causes of greenhouse effect greenhouse effect pollution and its effects

Which of the following is not a greenhouse gas?

  1. $N _2O$
  2. CFC

  3. $O _3$
  4. $SO _2$
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The gases which are transparent to solar radiation but retain and partially reflect back long wave heat radiations are called greenhouse gases. The various greenhouse gases are carbon dioxide, methane, chlorofluorocarbons and nitrous oxide. Other gases of minor significance are water vapour and ozone. Thus, the correct answer is option D.

Multiple choice biology global environmental change causes of greenhouse effect greenhouse effect pollution and its effects

Of the gases listed below, which is NOT believed to be responsible for enhancing the earth's greenhouse effect?

  1. Chlorofluorocarbons $(CFC _{s})$
  2. Molecular oxygen $(O _{2})$
  3. Nitrous oxide $(N _{2}O)$
  4. Carbon dioxide $(CO _{2})$
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Greenhouse gases are those that absorb infrared radiation. Molecular oxygen (O2) and nitrogen (N2) are symmetric diatomic molecules and do not absorb infrared radiation, so they do not contribute to the greenhouse effect.

Multiple choice biology global environmental change causes of greenhouse effect greenhouse effect pollution and its effects

The atmospheric greenhouse effect is produced mainly by the:

  1. Absorption and re-emission of visible light by the atmosphere

  2. Absorption and re-emission of ultraviolet radiation by the atmosphere

  3. Absorption and re-emission of infrared radiation by the atmosphere

  4. Absorption and re-emission of visible light by clouds

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

The greenhouse effect occurs because greenhouse gases in the atmosphere absorb outgoing infrared radiation (heat) from the Earth's surface and re-emit it, trapping the energy.

Multiple choice biology global environmental change causes of greenhouse effect greenhouse effect pollution and its effects

Which one of the following is the correct percentage of the two (out of the total of 4) green house gases that contribute to the total global warming?

  1. CFCs 14%, Methane 20%

  2. CFCs 20%, Methane 14%

  3. N$ _2$O 6%, CO$ _2$ 86%
  4. Methane 20%, N$ _2$O 18%
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Greenhouse effect increases the temperature of the earth.The gases responsible for greenhouse traps the infrared radiations which lead to heating of the earth's surface. The primary greenhouse gases in earth's atmosphere are water vapour, carbon dioxide, methane, nitrous oxide, and ozone. The 

Composition of greenhouse gases are 
CO$ _2$- 56% 
CFCs -14%, 
Methane - 20% 
Nitrous Oxides - 8%, 
Water Vapours - 2%. 
Therefore, the correct answer is option A.

Multiple choice biology global environmental change causes of greenhouse effect greenhouse effect pollution and its effects

Greenhouse effect is mainly due to 

  1. $SO _2$
  2. $CO _2$
  3. CO

  4. $O _2$
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

When the solar radiation falls on earth surface heating it, a small proportion is reflected back. Earth's surface re-emits heat in the form of infrared radiation but part of this does not escape into space as atmospheric gases (e.g., carbon dioxide, methane, etc.) absorb a major fraction of it is called as greenhouse effects. The molecules of these gases absorb solar energy and increase the earth's temperature and these gases are called as greenhouse gases. Thus, the correct answer is option B.

Multiple choice biology global environmental change causes of greenhouse effect greenhouse effect pollution and its effects

Which one of the following is the correct percentage of the two (out of the total of 4) greenhouse gases that contribute to the total global warming?

  1. $N _2 O$ 6%, $CO _2 $86%
  2. Methane 20%, $N _2O$ 18%
  3. $CFCs$ 14%, Methane 20%
  4. $CO _2$ 40%, $CFCs$ 30%
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A greenhouse gas, in the atmosphere, is the gas 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. The primary greenhouse gases in Earth's atmosphere are water vapour, carbon dioxide, methane and nitrous oxide. 

Composition of greenhouse gases are 
CO$ _2$ - 56% 
CFCs - 14%, 
Methane - 20% 
Nitrous Oxides - 8%, 
Water Vapours - 2%. 
Therefore, the correct answer is option C.

Multiple choice biology global environmental change causes of greenhouse effect greenhouse effect pollution and its effects

Which of the following is not a greenhouse gas?

  1. $CH _4 $
  2. $N _2O$
  3. Water vapor

  4. $CO _2$
  5. None of the above

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

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. The most significant greenhouse gases are water vapor ($H _2O$), carbon dioxide ($CO _2$), methane ($CH _4$) and nitrous oxide ($N _2O$), according to the Environmental Protection Agency (EPA).

Multiple choice biology global environmental change causes of greenhouse effect greenhouse effect pollution and its effects

Which one of following pairs of gases is the major cause of greenhouse effect?

  1. $CO _2$ and $O _3$
  2. $CO _2$ and $CO$
  3. $CFC$ and $SO _2$
  4. $CO _2$ and $N _2O$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The major greenhouse gases responsible for greenhouse effect are carbon dioxide, ozone, methane and water vapour. These gases acts like a thick warm blanket outside that surrounds this planet and regulates climate control. Water vapour causes about 36-70% of the greenhouse effect on earth, carbon dioxide CO$ _2$, which causes 9-26%; methane, which causes 4-9%, and ozone, which causes 3-7%.

Therefore, the correct answer is option A.

Multiple choice biology global environmental change causes of greenhouse effect greenhouse effect pollution and its effects

Which of the following is not a green house gas ?

  1. Methane

  2. Carbon dioxide

  3. Nitrous oxide

  4. Ammonia

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

Ammonia is not a green house gas. Methane, carbon dioxide and nitrous oxide are all greenhouse gases. They contribute to the greenhouse effect. Ammonia has no effect on the green house effect. So, option D ammonia s the correct answer.