Question

A pollutant that causes irritation in the throat and nose.
A. CO
B. $SO_2$
C. $CH_4$
D. Chlorofluorocarbons

Answer 1

Hint: The effects of this pollutant felt just after 10 to 15 minutes of inhalation.

Complete answer: Inhalation of $SO_2$ irritates the nose, throat, and the airways to cause coughing, wheezing, shortness of breath, or a tight feeling around the chest.
1. Carbon monoxide is produced when fuel such as gas, oils, coal, and wood do not burn fully. Burning charcoal, running cars, and the smoke from cigarettes also produce carbon monoxide gas.
Carbon monoxide binds to hemoglobin over 200 times more easily than oxygen does.
Oxygen will not be able to find space to get into the hemoglobin . As a result parts of the body will not get oxygen and the affected parts will die.
2. Methane is emitted during the production and transport of coal, natural gas, and oil.
Methane emission also results from livestock and in other agricultural practices and in the decay of organic waste in municipal solid waste landfills.
Methane is a greenhouse gas. It is responsible for increasing the earth’s temperature.
3. Chlorofluorocarbons are also a greenhouse gas and responsible for increasing the earth’s temperature. Chlorofluorocarbons also destroy the ozone layer which protects us from UV harmful rays.

Additional information: Air pollution: It occurs when the air contains gases, dust, fumes, or odor in harmful amounts. This is the amount that is harmful to the health or comfort of humans and animals and which could cause damages to plants and materials.

So the correct answer is ( B )

Note: Causes of air pollution are: Exhaust from automobiles,
Exhaust from factories and power plants,
Chlorofluorocarbons, and
Suspended particulate matter.