Question

What are secondary pollutants ???​

Answer 1

SECONDARY POLLUTANTS :-

secondary pollutant is not directly emitted as such, but forms when other pollutants (primary pollutants) react in the atmosphere.

secondary pollutant is not directly emitted as such, but forms when other pollutants (primary pollutants) react in the atmosphere.Examples of a secondary pollutant include ozone, which is formed when hydrocarbons (HC) and nitrogen oxides (NOx) combine in the presence of sunlight; NO2, which is formed as NO combines with oxygen in the air; and acid rain, which is formed when sulfur dioxide or nitrogen oxides react with water.

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Answer 2

Answer:

Secondary pollutants are defined as the pollutants which form in the atmosphere. These secondary pollutants do not come directly from a source (like vehicles or power plants). It forms as a result of the pollutants the sources emit and reacting with the molecules in the atmosphere. Pollutants which emits into the environment directly from a source are primary pollutants.

Explanation:

Secondary pollutants are of much concern as they can be formed from many different compounds. The phenomena of photochemical smog (seen in high-density cities ) are a result of the interactions of primary pollutants with other molecules in the air such as molecular oxygen, water, and hydrocarbons. The combination of these forms yellow clouds which is very harmful to humans.