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

Which of the following statements are correct?

I. Greenhouse gases are responsible for global warming. They should be eliminated to save the planet. II CO2 is the most dangerous of the greenhouse gases. Reduction in the release of CO2 would surely bring down the temperature. III The greenhouse effect could be traced back to the industrial revolution. But the current development and the patterns of life have enhanced their emissions. IV. Deforestation has been one of the biggest factors contributing to the emission of greenhouse gases.

  1. I and III

  2. II and III

  3. II, III and IV

  4. III and IV
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Greenhouse gases are responsible for global warming. But they cannot be eliminated as one of them is CO2 , which is essential for plants to synthesise food. CO2 is not the most dangerous gas, it is said so just because it is present in highest concentration in the atmosphere. Otherwise, on per molecule basis, the most dangerous greenhouse gas is methane.

Multiple choice

Kyoto Protocol covers emissions of six main greenhouse gases and methane is one of them. Which of the following are sources of methane emission?

  1. Combustion of fossil fuels
  2. Wetlands
  3. Automobiles

  1. 1 and 2 only

  2. 1 and 3 only

  3. 2 and 3 only

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

All three are sources of methane. Fossil fuels are one of the largest sources of CH4 emissions. Methane emissions from passenger cars (automobiles) have, however, dropped as the use of catalytic converters has increased. Methane can also be emitted by natural sources such as wetlands.

Multiple choice

Which one of the following contributes largely to the greenhouse effect?

  1. Ozone

  2. Water vapor

  3. Carbon monoxide

  4. Carbon dioxide

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

The primary greenhouse gases in Earth's atmosphere are water vapor, carbon dioxide, methane, nitrous oxide, and ozone. Water vapor is the largest contributor to the Earth's greenhouse effect. On an average, it probably accounts for about 60% of the warming effect.

Multiple choice

Which of the following gases is/are not a greenhouse gas?

  1. Methane

  2. Carbon dioxide

  3. Hydrogen

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

The primary greenhouse gases in Earth's atmosphere are water vapor, carbon dioxide, methane, nitrous oxide and ozone. Without greenhouse gases, the average temperature of Earth's surface would be about −18°C (0°F), rather than present average of 15°C (59°F).

Multiple choice

Which one of the following is a greenhouse gas?

  1. Oxygen

  2. Hydrogen

  3. Carbon dioxide

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

Carbon dioxide is the primary greenhouse gas responsible for trapping heat in Earth's atmosphere through the greenhouse effect. It is produced by burning fossil fuels, deforestation, and various industrial processes. Oxygen, hydrogen, and nitrogen are not greenhouse gases as they do not absorb infrared radiation effectively.

Multiple choice

Which of the following contributes most to the “Greenhouse effect”?

  1. Nitrogen

  2. Methane

  3. Carbon dioxide

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

Carbon dioxide is responsible for about 75% of all greenhouse gas emissions from human activities, making it the primary contributor to the greenhouse effect. While methane is more potent per molecule, its concentration is much lower. Nitrogen and oxygen are not greenhouse gases.

Multiple choice

What is the main component of biogas?

  1. Methane

  2. Carbon dioxide

  3. Butane

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

Biogas comprises primarily methane (CH4) and carbon dioxide (CO2) and may have small amounts of hydrogen sulphide (H2S), moisture and siloxanes. The major component out of all of them is methane.

Multiple choice

The green house gas effect is caused by the effect of excess?

  1. carbon dioxide

  2. carbon monoxide

  3. carbon tetrachloride

  4. sulphuric dioxide
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The greenhouse effect is primarily caused by excess carbon dioxide (CO2) in the atmosphere, which traps heat. Carbon monoxide is toxic but not a greenhouse gas, carbon tetrachloride is a solvent, and sulphuric dioxide contributes to acid rain but is not the primary greenhouse gas.