Which of the following is not an air pollutant ?
(a) water vapour (b) carbon monoxide
(c) methane (d) oxygen
Answers
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The water vapour is not an air pollutant.
- A powerful greenhouse gas called the methane is emitted as leakage from natural gas systems and is a short-lived air pollutant.
- A molecule of three atoms formed by oxygen is called the ozone and this ozone in the troposphere is a hazardous pollutant.
- Carbon monoxide is a colorless, odorless, tasteless, and toxic air pollutant. It is produced in the incomplete combustion of carbon-containing fuels. A potentially harmful ground-level ozone is formed by the reaction of carbon monoxide with other pollutants.
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The water vapour is not an air pollutant.
Option (A) is correct.
Explanation:
Water vapour is not an air pollutant.
- Carbon monoxide is a toxic air pollutant. It is released during the incomplete combustion of organic compounds.
- Methane is a natural gas or fuel. It is made up of carbon and hydrogen compounds. These carbon and hydrogen compounds are also known as hydrocarbons.
- Oxygen is a component of air. As the air is made up of oxygen, nitrogen, carbon and various other gases in trace amounts.
Thus the water vapour is not an air pollutant.
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