Question

what is photo chemical reaction?​

Answer 1

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Those reaction which takes place in the presence of life is called photo chemical reaction.

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Answer 2

Some reactions do not take place in the dark but

take place only in the presence of light or some

other radiation. Such reactions are known as

‘photochemical reactions’. For example:

Photosynthesis of HCl gas:

H 2 (g) + Cl 2 (g) + hν ——————-> 2 HCl (g)

Light is a form of energy.