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

Consider the following statements:

  1. Growing rice results in the release of methane into the atmosphere.
  2. Kyoto Protocol is to carbon dioxide as Montreal Protocol is to carbon monoxide.

Which of the given statements is/are correct?

  1. Only (1)

  2. Only (2)

  3. Only (1) and (2)

  4. Neither (1) nor (2)
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Statement (1) is correct. The flooding of rice field cuts off the oxygen supply from the atmosphere to the soil that results in anaerobic fermentation of soil organic matter. Methane is a major end product of anaerobic fermentation. It is released from submerged soils to the atmosphere by diffusion and ebullition and through roots and stems of rice plants. Statement (2) is incorrect. The Kyoto protocol is the proposal to reduce Carbon Dioxide, and the Montreal protocol is to reduce the Chlorofluorocarbons to protect the ozone layer.

Multiple choice

Which of the following are the immediate concerns regarding carbon cycle?

a. Output rate of carbon locked in deposits of coal, petroleum and natural gas. b. Green house effect is caused by CO2. c. Increase in CO2 on Earth’s atmosphere by 12 to 14%. d. Increase in CO2 decreases primary productivity. e. Increase in photorespiration.

  1. a, b and c

  2. b, c and d

  3. c, d and e

  4. a, d and e
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

All these are the immediate concerns regarding carbon cycle.

Multiple choice

Which of the following combinations constitutes Greenhouse gases?

  1. CO, SO2 and NO2

  2. CO2, CH4, N2O, C2H6, SO2, CFC11, CFC12 and CFC113

  3. Different hydrocarbons like CH4, C2H2 and C2H6

  4. H2SO4, (NH4)SO4, mist and vapours

  5. CO and nicotine
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Greenhouse gases constitute CO2, CH4, N2O, C2H6, SO2, CFC11, CFC12 andCFC113.  It is a major air pollutant  and the actual reason of global warming. Due to increase of emission of greenhouse gases, the amount of heat that could be radiated back into space at night is reduced considerably  and  as a result the temperature of the earth is increased.

Multiple choice

Arrange the following greenhouse gases in the decreasing order of the greenhouse effect caused by them.

  1. Methane
  2. Carbon Dioxide
  3. Water Vapour
  4. Ozone

  1. 2, 1, 3, 4

  2. 2, 1, 4, 3

  3. 3, 2, 1, 4

  4. 3, 1, 2, 4
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The major greenhouse gases are water vapour, which causes about 36 - 70% of the greenhouse effect (excluding clouds); carbon dioxide (CO2), which causes 9 - 26%; methane (CH4), which causes 4 - 9%; and ozone, which causes 3 - 7%.

Multiple choice

Arrange the following greenhouse gases in decreasing order of their efficiency in trapping infrared radiations.

  1. Nitrous oxide
  2. Methane
  3. Carbon dioxide

  1. 1, 2, 3

  2. 2, 3, 1

  3. 2, 1, 3

  4. 3, 2, 1
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Nitrous oxide traps heat about 300 times more effectively than carbon dioxide and can stay in the atmosphere for a century. One molecule of methane is 20 times more efficient at trapping infrared radiation radiated from the Earth’s surface than a molecule of carbon dioxide.

Multiple choice

Which of the following is a major constituent of natural gas?

  1. CH4

  2. CH3OH

  3. C2H6

  4. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Natural gas is primarily composed of methane (CH4), typically 70-90% by volume. The remaining components include ethane, propane, butane, and other gases. Option A correctly identifies methane as the major constituent. CH3OH is methanol (alcohol), C2H6 is ethane (a minor component), and "None of these" is incorrect.

Multiple choice

Why is carbon dioxide called a green-house gas?

  1. It is used in photosynthesis

  2. It traps the outgoing solar radiation

  3. Used in greenhouse to increase plant growth

  4. It traps the insolation

  5. It is transparent to heat
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Carbon dioxide belongs to a group of compounds known as greenhouse gases because of their ability to trap and reflect the sun's radiation back to earth.

Multiple choice

Which of the following is not a greenhouse gas?

  1. Water vapour

  2. Carbon monoxide

  3. Nitrous oxide

  4. Carbon dioxide

  5. None of the above
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

The primary greenhouse gases in the earth's atmosphere are water vapour, carbon dioxide, methane, nitrous oxide and ozone.