Advertisement Remove all ads

Write Down the Reactions Involved During the Formation of Photochemical Smog. - Chemistry

Write down the reactions involved during the formation of photochemical smog.

Advertisement Remove all ads

Solution

Photochemical smog is formed as a result of the reaction of sunlight with hydrocarbons and nitrogen oxides. Ozone, nitric oxide, acrolein, formaldehyde, and peroxyacetyl nitrate (PAN) are common components of photochemical smog. The formation of photochemical smog can be summarized as follows:

Burning of fossil fuels leads to the emission of hydrocarbons and nitrogen dioxide in the atmosphere. High concentrations of these pollutants in air results in their interaction with sunlight as follows:

`NO_(2g)`             `NO_(g) + O_(g)`

Nitrogen dioxide                      Nitric oxide

`O_(g) + O_(2(g)) ↔ O_(3(g))`

`O_(3(g)) + NO_(g)  -> NO_(2(g)) + O_(2(g))`

While ozone is toxic in nature, both NO2 and O3 are oxidizing agents. They react with the unburnt hydrocarbons in air to produce formaldehyde, PAN, and acrolein.

`3CH_4 + 2O_3 -> 3CH_2 =O + 3H_2O`

                         Formaldehyde

  Is there an error in this question or solution?
Advertisement Remove all ads

APPEARS IN

NCERT Class 11 Chemistry Textbook
Chapter 14 Environmental Chemistry
Q 7 | Page 413
Advertisement Remove all ads
Advertisement Remove all ads
Share
Notifications

View all notifications


      Forgot password?
View in app×