Environmental Studies

Air Pollution

2,340 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

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.

Multiple choice physics towards green energy non-conventional sources of energy electric energy generation and environment renewable and non-renewable energy

The air pollution caused by the internal combustion engine vehicles can be reduced by using :

  1. CNG gas

  2. LPG

  3. petrol

  4. either (a) or (b).
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Answer is A.

Carbon monoxide, nitrogen oxides, and hydrocarbons are released when fuel is burned in an internal combustion engine and when air/fuel residuals are emitted through the vehicle tailpipe. Gasoline vapors also escape into the atmosphere during refueling and when fuel vaporizes from engines and fuel systems caused by vehicle operation or hot weather.
The pollutants in vehicle emissions are known to damage lung tissue, and can lead to and aggravate respiratory diseases, such as asthma. Motor vehicle pollution also contributes to the formation of acid rain and adds to the greenhouse gases that cause climate change.
Pollutants emitted directly from vehicles are not the only cause for concern. On warm, sunny days, hydrocarbons react with oxides of nitrogen to create a secondary pollutant, ozone. In many urban areas, motor vehicles are the single largest contributor to ground-level ozone which is a common component of smog. Ozone causes coughing, wheezing and shortness of breath, and can bring on permanent lung damage, making it a cause of crucial public health problems.
Hence, CNG gas is used to control the air pollution. ompressed natural gas, or CNG, is natural gas under pressure which remains clear, odorless, and non-corrosive. Although vehicles can use natural gas as either a liquid or a gas, most vehicles use the gaseous form compressed to high pressures.

Multiple choice chemistry changes around us effects of oxidation reactions in daily life corrosion of metals electroplating and its application

In the atmosphere of industrial smog, copper corrodes to form:

  1. basic copper carbonate and sulphate

  2. copper oxide

  3. copper sulphide

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

Architectural structures built with copper corrode to give green verdigris (copper carbonate). It can be a mixture of carbonate and sulfate compounds in various amounts, depending upon environmental conditions such as sulfur-containing acid rain.

Multiple choice chemistry changes - physical and chemical effects of oxidation reactions in daily life corrosion of metals electroplating and its application

In the atmosphere of industrial smog, copper corrodes to form:

  1. Basic copper carbonate

  2. Copper sulphide

  3. Basic copper sulphate

  4. Copper oxide
Reveal answer Fill a bubble to check yourself
A,C Correct answer
Explanation
Reactions taking place are:
$8Cu\, +\, 6H _{2}O\, +\, 2SO _{2}\, +\, 5O _{2}\, \rightarrow\,  2[CuSO _{4}.3Cu(OH) _{2}]$ 

$2Cu\, +\, H _{2}O\, +\, CO _{2}\, +\, O _{2}\, \rightarrow\,  [CuCO _{3}.Cu(OH) _{2}]$

Hence, options A and C are correct
Multiple choice chemistry changes around us effects of oxidation reactions in daily life corrosion of metals electroplating and its application

The presence of $CO _2$ in the atmosphere results in:

  1. rusting.

  2. dusting.

  3. electroplating.

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

The presence of $CO _2$ in the atmosphere will do iron oxide rusting. When a drop of water hits an iron object, two things begin to happen almost immediately. 

First, the water, a good electrolyte, combines with carbon dioxide in the air to form a weak carbonic acid, an even better electrolyte. As the acid is formed and the iron dissolved, some of the water will begin to break down into its component pieces - hydrogen and oxygen. 
The free oxygen and dissolved iron bond into iron oxide, in the process freeing electrons.