Question

2. Give example of each the following:
a. Photochemical decomposition
b. Electrochemical decomposition​

Answer 1

EXAMPLE OF PHOTOCHEMICAL DECOMPOSITION

When silver bromide ( 4 AgBr) in presence of sunlight break down to give 2Ag2Br and Br2

EXAMPLE OF Electrochemical decomposition​

• Electrolytic decomposition: In the presence of electricity, water breaks up into hydrogen and oxygen.

Answer 2

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QUESTION -

Give example of each the following:

a. Photochemical decomposition

b. Electrochemical decomposition

Answer -

A. PHOTOCHEMICAL REACTION

These are the reactions which take place in presence of light

Photosynthesis is one of its example

Light is necessary for it

6CO2+6H20------------------------------------------------------------->C6H12O6+6O2

Under sunlight and chlorophyll

B. ELECTROCHEMICAL REACTION

Electrochemical reaction is an process either caused or accompanied by the passage of an electric current and involving in most cases the transfer of electrons between two substances—one a solid and the other a liquid.

Like below is the example

Zn(s)+2H+ (aq)---------------->Zn 2+ (aq)+H 2 (g)

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