Write down the reactions involved during the formation of photochemical smog.
Or
Discuss the mechanism of photochemical smog formation.
What are the harmful effects of photochemical smog and how can these be controlled ?
Control of photochemical smog: Photochemical smog can be controlled or suppressed by:
(i) Installation of efficient catalytic converters in the automobiles to reduce photochemical smog i.e. it prevents the release of nitrogen oxides and hydrocarbon to the atmosphere.
(ii) Certain compounds which trap free radicals. When these compounds are sprayed in the atmosphere, they generate free radicals which readily combine with free radical precursors of photochemical smog.