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

What did primitive atmosphere of Earth contain?

  1. Oxygen, ammonia and methane

  2. Carbon dioxide, ammonia and methane

  3. Carbon dioxide, oxygen and methane

  4. Water, methane and ammonia

  5. Water, oxygen and carbon dioxide
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The primitive atmosphere of Earth had water, methane and ammonia.

Multiple choice

Which one of the following substances continues most to the causation of greenhouse effect in nature?

  1. Carbon dioxide

  2. Hydrogen fluoride

  3. Carbon monoxide

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

Carbon dioxide is the most significant anthropogenic contributor to the greenhouse effect due to its high atmospheric concentration and long residence time. While water vapor is actually the most abundant greenhouse gas overall, CO₂ from human activities is the primary driver of enhanced greenhouse warming.

Multiple choice

Which of the following is not a greenhouse gas?

  1. Carbon dioxide

  2. Methane

  3. Water vapour

  4. Oxygen

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

Oxygen is not a greenhouse gas. It is absolutely essential for useful processes like respiration and combustion.

Multiple choice

Which of the following options is a greenhouse gas?

  1. O2

  2. N2

  3. CO2

  4. CO

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

Carbon dioxide (CO2) is a greenhouse gas that absorbs and re-emits infrared radiation, trapping heat in the atmosphere. Oxygen (O2) and nitrogen (N2) make up most of the atmosphere but do not trap heat effectively. Carbon monoxide (CO) is not classified as a major greenhouse gas like CO2.

Multiple choice

The excretory gases of plants are ___________.

  1. CO2 and N2

  2. CO2 and O2

  3. N2 and H2

  4. O2 and N2
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The process of removal of waste products of metabolism is very essential to life. Plants get rid of excretory gases through the pores (stomata) on the surface of the leaves.

Multiple choice

Which of the following statements is correct?

  1. Carbon dioxide allows the earth to radiate heat rapidly at night.

  2. Percentage of carbon dioxide in air varies form 3% to 4%.

  3. Argon is a noble gas which is used for filling electric bulbs.

  4. A combustible substance combines with nitrogen to liberate heat energy.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Argon is used to fill light bulbs to inhibit the evaporation of the tungsten filaments and increase bulb life.

Multiple choice

The chief constituent of biogas is ___________.

  1. methane

  2. hydrogen

  3. C2H5

  4. CO2
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Biogas is primarily composed of methane (CH4), which typically makes up 50-75% of the gas mixture. Methane is the main combustible component that gives biogas its energy value. Option A correctly identifies methane as the chief constituent. Option B (hydrogen) is present only in trace amounts. Option C represents ethyl alcohol, which is not a component of biogas. Option D (CO2) is present as a non-combustible component (30-40%) but is not the chief constituent.