Define photochemical reaction and electrochemical reaction with an example.

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Solution

Photochemical reaction: It is a reaction which occurs with absorption of light energy.

For example: Photosynthesis
$6 C O_{2} + 6 H_{2} O \to C_{6} H_{12} O_{6} + 6 O_{2}$

Electrochemical reaction: It is a reaction which occurs with absorption of electrical energy.

For example: Electrolysis of water
$2 H_{2} O \to 2 H_{2} + 2 O_{2}$

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Similar questions

Define:

(a) Photochemical reaction

(b) Electrochemical reaction.

Give one example in each case.

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