Question

what's the correct definition of photochemical and classical smog??

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Answer 1

Smog is a kind of air pollution, originally named for the mixture of smoke and fog in the air. Classic smog results from large amounts of coal burning in an area and is caused by a mixture of smoke and sulfur dioxide. In the 1950s a new type ofsmog, known as Photochemical Smog, was first described.

Answer 2

Photochemical reaction:

A chemical reaction initiated by the absorption of energy in the form of light. The consequence of molecules’ absorbing light is the creation of transient excited states whose chemical and physical properties differ greatly from the original molecules. These new chemical species can fall apart, change to new structures, combine with each other or other molecules, or transfer electrons, hydrogen atoms, protons, or their electronic excitation energy to other molecules. Excited states are stronger acids and stronger reductants than the original ground states.

Classical Smog:

There are two types of smog depending upon the type of pollutants present in the atmosphere. The differences between classical smog and photochemical smog are: Classical smog. Photo chemical smog. Classical smog is a mixture of sulfur dioxide and coal smoke with fog.