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

Which of the following is not a primary contributor to the greenhouse effect?

  1. Carbon dioxide

  2. Carbon monoxide

  3. Chlorofluorocarbons

  4. Methane gas

  5. Nitrous oxide
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Chlorofluorocarbons (CFCs) are nontoxic, nonflammable chemicals containing atoms of carbon, chlorine, and fluorine. Chlorofluorocarbons released from the surface of the Earth, rise slowly into the stratosphere.This is the gas responsible for depletion of ozone layer.

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).