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 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.

Multiple choice chemistry nitrogen and sulfur sulfur and its oxides acid deposition natural resources- air, water and land

Which statement describes a disadvantage of sulfur dioxide?

  1. It can be used as a bleach in making wood pulp

  2. It can be used to kill bacteria in food

  3. It can be used to manufacture sulfuric acid

  4. It can dissolve the limestone in statues
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

$\text{sulphur dioxide can dissolve the limestone.}$


$CaCO _3+H _2O \rightarrow Ca(OH) _2+CO _2$
$Ca(OH) _2+SO _2 \rightarrow CaSO _3+H _2O$

Multiple choice chemistry nitrogen and sulfur sulfur and its oxides acid deposition natural resources- air, water and land

Which of the following is the most important man-made source of sulfur dioxide?

  1. Fossil fuel combustion

  2. Conversion of wood pulp to paper

  3. Both a and b

  4. Decaying of plant matter
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The most important man-made sources of sulfur dioxide are fossil fuel combustion, smelting, manufacture of sulfuric acid, conversion of wood pulp to paper, incineration of refuse and production of elemental sulfur.

Multiple choice chemistry nitrogen and sulfur sulfur and its oxides acid deposition natural resources- air, water and land

Sulphur dioxide causes ______ in trees.               

  1. Emphysema

  2. Chlorosis

  3. Bronchitis

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

Oxides of sulphur are produced when sulphur containing fossil fuels are burnt. Sulphur dioxide is a poisonous gas harmful to both animals and plants. It is poisonous to trees, causing dwarfing and Chlorosis.

Multiple choice chemistry natural resources- air, water and land sulfur and its oxides acid deposition nitrogen and sulfur

In cities like Bombay and Calcultta, the major air pollutants is/are:

  1. ozone

  2. carbon monoxide and oxides of sulphur

  3. hydrocarbons and not air

  4. algal spores and marsh gas
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Causes of air pollution in big cities are -
1. Burning of fossil fuels: Sulfur dioxide emitted from the combustion of fossil fuels like coal, petroleum and other factory combustibles is one the major cause of air pollution. carbon monoxide caused by improper or incomplete combustion and generally emitted from vehicles is another major pollutant along with nitrogen oxides, that is produced from both natural and man made processes.
2. Exhaust from factories and industries: Manufacturing industries release large amount of carbon monoxide, hydrocarbons, organic compounds, and chemicals into the air thereby depleting the quality of air. Manufacturing industries can be found at every corner of the earth and there is no area that has not been affected by it.

Multiple choice

The primary cause of acid rain is:

  1. The burning of fossil fuels

  2. The eruption of volcanoes

  3. The decomposition of organic matter

  4. The release of methane from wetlands

  5. The use of fertilizers in agriculture
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The burning of fossil fuels, such as coal and oil, releases sulfur dioxide and nitrogen oxides into the atmosphere, which react with water vapor to form sulfuric acid and nitric acid, leading to acid rain.