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Question

Define:

(a) Photochemical reaction

(b) Electrochemical reaction.

Give one example in each case.


Solution

(a) It is a reaction which occurs with the absorption of light energy
Example: Photosynthesis

6C02 + H2O  C6H12O6 + 6O2 

(b) It is a reaction which occurs with the absorption of electrical energy
Example: Acidulated water breaks into hydrogen and oxygen.

2H2O  2H2 + O2


Chemistry
Concise Chemistry
Standard IX

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