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 geography hazards major hazards in india and prevention tsunami and floods pollution and environment study of water pollution threats to water resource

Which one of the following will not help in containing air pollution?

  1. Conservation of forests

  2. Expansion of agriculture

  3. Reducing vehicular emission

  4. Use of non-conventional sources of energy
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Expansion of agriculture often involves deforestation and land clearing, which contributes to air pollution rather than containing it.

Multiple choice geography hazards major hazards in india and prevention tsunami and floods pollution and environment study of water pollution threats to water resource

Air pollution according to origin are classified into ______________.

  1. primary pollutants

  2. secondary pollutants

  3. tertiary pollutants

  4. only A and B
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Air pollutants are classified by their origin into primary pollutants (emitted directly) and secondary pollutants (formed in the atmosphere).

Multiple choice geography hazards major hazards in india and prevention tsunami and floods pollution and environment study of water pollution threats to water resource

The pollutants that are emitted directly from the sources and are found in the atmosphere in the form in which they are emitted are known as______________.

  1. primary pollutants

  2. secondary pollutants

  3. tertiary pollutants

  4. none of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Primary pollutants are emitted directly from a source into the atmosphere, such as carbon monoxide from car exhausts. Secondary pollutants are formed in the atmosphere through chemical reactions between primary pollutants.

Multiple choice geography hazards major hazards in india and prevention tsunami and floods pollution and environment study of water pollution threats to water resource

According to the state of matter air pollutants are classified into how many types?

  1. 2

  2. 3

  3. 4

  4. 5
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Air pollutants are generally classified based on their physical state into two types: gaseous pollutants (like CO2, SO2) and particulate matter (like dust, smoke, mist).

Multiple choice geography hazards major hazards in india and prevention tsunami and floods pollution and environment study of water pollution threats to water resource

Gasoline fuel, motor vehicles fuels, burning of wood and coal, solid waste disposal leads to which air pollutant?

  1. Carbon Monoxide

  2. Nitrogen Oxides

  3. Sulphur Oxides

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

Carbon monoxide is a product of incomplete combustion of carbon-containing fuels, such as gasoline, wood, and coal, which are common in motor vehicles and waste disposal.

Multiple choice zoology environmental pollution primary air pollutants air pollution - types and sources not for breathing not for drinking

Particulate pollution can be caused by

  1. Smoke

  2. Stone drilling

  3. Dust

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The air pollution is basically of two types:
A. Gaseous pollution: Harmful gases given out from variety of sources. 
B. Particulate pollution: Particles such as those of dust, smoke, mining, stone drilling, wearing of rubber tyres of motor vehicles.

Multiple choice zoology environmental pollution primary air pollutants air pollution - types and sources not for breathing not for drinking

Which of the following are true?

(i) Benzene hexachloride is a non biodegradable pollutant.
(ii) Anthropogenic air pollutants are natural in origin.
(iii) Carbon monoxide is a primary air pollutant.
(iv) Sulphur dioxide causes brown air effect during traffic congestion in cities.

  1. (i) and (iii) only

  2. (i) and (ii) only

  3. (ii) and (iii) only

  4. (ii) and (iv) only

  5. (i) and (iv) only
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

 In traffic-congested city air, nitrogen oxides produce brown air or reddish-brown haze. The pollutant that does not get degraded or broken down into the harmless material is a nondegradable pollutant example Benzene Hexachloride (BHC). Anthropogenic pollution is man-made pollution resulting from human activities like burning fossil fuel, deforestation, mining, sewage etc. A primary air pollutant is a pollutant that persists in the environment in the form it is produced example carbon monoxide.

Multiple choice zoology environmental pollution primary air pollutants air pollution - types and sources not for breathing not for drinking

Secondary pollutant which stops Hill reaction is

  1. Sulphuric acid

  2. Nitric acid

  3. Peroxyacetyl nitrate (PAN)

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

Secondary air pollutants are usually produced photochemically from primary pollutants and are called photochemical oxidants. Secondary air pollutants occur in photochemical smog. Nitrogen oxides, oxygen and ketone bodies combine to form peroxy acyl nitrates or PAN which is a major constituent of photochemical smog. PAN damages chloroplasts, inhibit electron system and spoil enzyme systems controlling cellular metabolism which causes Hill reaction during photosynthesis .

Multiple choice zoology environmental pollution primary air pollutants air pollution - types and sources not for breathing not for drinking

Two components of automobile exhausts, which can interact to produce secondary pollutants are

  1. Carbon monoxide and nitrogen oxides

  2. Nitrogen oxides and hydrocarbons

  3. Carbon dioxide and sulphur dioxide

  4. Sulphur and nitrogen oxides
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The primary pollutants are directly released from the source like hydrocarbons are released when fossil fuels are burnt and nitrogen oxides are released due to vehicular combustion and also fossil fuel burning. When these primary pollutants react with each other they form a more potent secondary pollutant called the ozone, which is a poisonous gas in the troposphere.

Hence, the correct answer is 'Nitrogen oxides and hydrocarbons'

Multiple choice zoology environmental pollution primary air pollutants air pollution - types and sources not for breathing not for drinking

A secondary pollutant is

  1. CO
  2. $CO _2$

  3. PAN

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

The photochemical smog has the chief constituent of the peroxy-acetyl nitrate (PAN) that are secondary pollutants as they formed by the primary pollutants. These are formed when the hydrocarbon radicals react with the oxygen in the presence of the sunlight. It forms a brown-coloured haze. This also results in the formation of the ground-level ozone. 

So, the correct answer is 'PAN'

Multiple choice zoology environmental pollution primary air pollutants air pollution - types and sources not for breathing not for drinking

Which one of the following acts as secondary pollutants?

  1. Br
  2. $NO _2$
  3. $HNO _3$
  4. $Cl _2$
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Pollutants may be primary or secondary.
  • Primary pollutants are the pollutants that are directly released or emitted in the atmosphere. 
  • Secondary pollutants are the pollutants which are formed when primary pollutants react with themselves or with other components of atmosphere.
An example of secondary pollutant is NO2 which is formed when NO reacts with oxygen in air.
So, the correct answer is 'NO2'.