Chemistry
Define :
(a) Photochemical reaction
(b) Electrochemical reaction
Give one example in each case.
Chemical Reaction
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Answer
(a) Photochemical reaction — It is a reaction that occurs with the absorption of light.
Example : Decomposition of silver nitrate
2AgNO3 2Ag + 2NO2 ↑ + O2 ↑
(b) Electrochemical reaction — It is a reaction that occurs with absorption of electrical energy.
Example : Acidulated water breaks into hydrogen and oxygen when electric current is passed through it.
2H2O 2H2 ↑ + O2 ↑
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