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 chemistry planet earth acid deposition air and air pollution natural resources- air, water and land

Acid rain is produced by:

  1. excessive release of CO in air
  2. excessive release of $SO _{2}$ and $H _{2}S$ in air
  3. excessive release of $NO _{2}$ and $SO _{2}$ in air
  4. excessive release of $NH _{3}$ and $CO _{2}$ in air
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Acid rain is the state when pH of rain falls 5.6. It is mainly due to the presence of oxides of sulphur and nitrogen ( $ NO _2 $ and  $ SO _2 $ in the atmosphere. They are transported into the atmosphere by wind an other air currents. 

Multiple choice chemistry planet earth acid deposition air and air pollution natural resources- air, water and land

Mark the example which in not correctly matched?

  1. Air pollutants - Oxides of sulphur, nitrogen and carbon

  2. Particulate pollutants - Dust, mist fumes

  3. Global warming - Methane, ozone, CFCs

  4. Water soluble chemical pollutants - Oxides of nitrogen, carbon and sodium
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Water-soluble pollutants are detergents, fertilizers, oils from factories and industries, ammonical nitrogen etc. Whereas oxides of nitrogen, carbon, and sodium are air pollutants that cause gaseous pollution. 

Multiple choice chemistry natural resources- air, water and land acid deposition air and air pollution atmospheric pollution

Atmosphere of big cities is polluted most by :

  1. Automobile exhausts

  2. Radioactive fall out

  3. Household waste

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

The main source of pollution in metro cities is automobile exhausts. 


As greater the city, more the population which uses private transport.


Hence, increase in pollution is caused by automobile exhausts.


Therefore, option A is correct.

Multiple choice chemistry planet earth acid deposition air and air pollution natural resources- air, water and land

Acid rain is due to :

  1. Combination of oxides of sulphur with rain water

  2. Combination of oxides of nitrogen with rain water
  3. Formation of $H _{2}SO _{4}$ and $HNO _{3}$

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

When gases like $NO _2$ and $SO _3$ go into the atmosphere and react with water and form $H _2SO _4$ and $HNO _3$, these acids come along with rain water and hence it is known as acid rain.

Multiple choice biology health and diseases non-infectious diseases non infectious diseases categories of diseases

Which of the following chemicals in automobile exhaust can cause cancer?

  1. Carbon monoxide

  2. Polycyclic hydrocarbons

  3. Lead

  4. Oxides of nitrogen
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The International Agency for Research on Cancer (IARC) part of the World Health Organisation announced that it had reclassified diesel exhaust as a 'definite carcinogen in highest category (Category 1). When diesel burns inside an engine it releases two potentially cancer-causing things: microscopic soot particles, and chemicals called polycyclic aromatic hydrocarbons or PAHs. There are three possible ways these can cause cancer. The microscopic particles making up diesel exhaust particulate matter are less than one-fifth the thickness of a human hair. They are small enough to penetrate deep into the lungs, causing respiratory disease. Inhaled PAHs could directly damage the DNA in the cells of our lungs leading to cancer. Secondly, the soot particles can get lodged deep inside the lungs, causing long-term inflammation, and thirdly this can increase the rate at which cells divide. So if any nearby lung cells pick up random mutations, this inflammation could make them more likely to grow and spread. 

Therefore, the correct answer is option B.

Multiple choice

What is smog?

  1. Bacteria in the air

  2. ozone in the troposhere

  3. CFCs

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

Smog is primarily ground-level ozone formed by chemical reactions between sunlight and pollutants like nitrogen oxides and volatile organic compounds. It is not bacteria or directly CFCs.

Multiple choice

Where do CFS's come from?

  1. Spray can

  2. Air conditioner

  3. Manufacturing foam

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

CFCs were widely used in various industrial and consumer applications, including aerosol sprays, refrigeration systems, and foam blowing agents.

Multiple choice

Where do CFCs come from?

  1. Spray cans

  2. Fire extinguishers

  3. Air conditioners

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

Chlorofluorocarbons (CFCs) were historically used in a wide variety of applications, including aerosol spray cans, refrigerants in air conditioners, and fire suppression systems.

Multiple choice

What is NOT a way to reduce ozone depletion?

  1. Buy appliances that do not contain CFC's and HCFC's

  2. Watch less TV

  3. Eat less meat

  4. Carpool
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

CFCs and HCFCs are chemicals that directly deplete the ozone layer. While eating less meat or carpooling may help with climate change, they are not primary methods for reducing ozone depletion; however, watching less TV has no scientific connection to ozone depletion at all.

Multiple choice

What is not a cause of ozone depletion?

  1. Cleaning supplies

  2. Vacuums

  3. Air conditioners

  4. Cars
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Vacuums are mechanical devices and do not release ozone-depleting substances. Cleaning supplies, air conditioners, and cars have historically used or contained CFCs or similar chemicals.