Environmental Studies

Air Pollution

2,298 Questions

Air pollution questions address the sources of emissions, indoor air quality, and the formation of photochemical smog. You will explore the impact of particulate matter, acid rain, and urban pollutants. This is a highly relevant subject for environmental studies and general awareness tests.

Photochemical smogParticulate matter emissionsAcid rain causesIndoor air pollutionAmmonia emissions

Air Pollution Questions

Multiple choice

Air pollution is caused by

Directions: Read the following passage and answer the question that follows.

Air pollution refers to the contamination of air, irrespective of indoors or outdoors.
Air pollution is the introduction of particulates, biological molecules, or other harmful materials into Earth’s atmosphere, causing diseases, death to humans, damage to other living organisms, food crops, or the natural or built environment.         
Air pollution can be further divided into two sections - Visible air pollution and invisible air pollution. The sustainment of all things living is due to a combination of gases that collectively form the atmosphere, the imbalance caused by the increase or decrease of the percentage of these gases can be harmful for survival.

Types of pollutants:
Direct pollutants/Primary pollutant: These are direct results of pollutant process. For example, Sulfur-dioxide emitted from factories.
Indirect pollutants/Secondary pollutants: These are caused by the intermingling and reactions of primary pollutants. Smog created by the interactions of several primary pollutants.

  1. diseases

  2. harmful water

  3. smog

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

'Smog' is the correct option as the harmful gases mix with air. Thus, it is the correct answer.

Multiple choice

Which of the following is utilised in reducing air pollution by removing dust, soot and fly-ash particles from the smoke coming out of chimneys of factories?

  1. Gravitational force

  2. Magnetic force

  3. Muscular force

  4. Electrostatic force

  5. Frictional force
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

This is the correct option. Electrostatic force is utilised in reducing air pollution by removing dust, soot and fly-ash particles from the smoke coming out of chimneys of factories.

Multiple choice

Acid rain occurs when _______ is/are released by industries.

  1. sulphur dioxide

  2. nitrogen oxide

  3. carbon dioxide

  4. both 1 and 2

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

Acid rain forms when sulfur dioxide (SO2) and nitrogen oxides (NOx) from industrial emissions react with water vapor in the atmosphere. Carbon dioxide contributes to general rain acidity but is not the primary cause of acid rain phenomenon.

Multiple choice

The major harmful gas emitted by automobile vehicles which causes air pollution is _____.

  1. Carbon Monoxide

  2. Methane

  3. Carbon dioxide

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

Carbon Monoxide (CO) is a major harmful pollutant emitted by automobile engines, especially when fuel combustion is incomplete. CO is highly toxic to humans because it binds to hemoglobin more readily than oxygen. While automobiles do emit CO2 and other pollutants, CO is specifically associated with acute health risks from vehicle exhaust.

Multiple choice

Acid rain is caused by pollution of environment by

  1. Carbon dioxide and nitrogen

  2. Carbon monoxide and carbon dioxide

  3. Ozone and carbon dioxide

  4. Nitrous oxide and sulphur dioxide
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Acid rain forms when sulphur dioxide and nitrogen oxides (including nitrous oxide) react with water vapor in the atmosphere to form sulphuric and nitric acids. These pollutants primarily come from burning fossil fuels in power plants and vehicles. Carbon dioxide, carbon monoxide, and ozone do not directly cause acid rain formation.

Multiple choice

Air pollution means:

  1. mixing of various gases

  2. water droplets in the air

  3. presence of undesirable elements in the air

  4. all of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Air pollution refers to the presence of harmful or undesirable substances in the atmosphere. These include particulates, gases, and biological molecules that can harm health or the environment.

Multiple choice

Which component of air does not support combustion?

  1. Oxygen

  2. Nitrogen

  3. Dust particles

  4. Nirogen and oxygen both
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Nitrogen makes up about 78% of air and does not support combustion. In fact, nitrogen is used in fire suppression systems because it displaces oxygen and stops burning. Oxygen supports combustion, while nitrogen acts as a diluent that prevents fires from spreading.