Question

give example of a photochemical reaction involving (i)silver salt (ii)water​

Answer 1

HERE'S YOUR ANSWER
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Sunlight
2AgCl ---------------> 2Ag + Cl2

And , 6CO2 + 12H2O ------------> C6H12O6 + 6O2 + 6H2O


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Answer 2

[tex]2AgBr(s)\overset{sunlight}\rightarrow 2Ag(s)+Br_2(g) [/tex]

$H_2O \rightarrow H_2 +\frac {1}{2}O_2$

Explanation:

Decomposition reaction : It is a type of reaction in which a larger molecule decomposes into two or more smaller molecule. It always require energy for breaking of bonds and hence is always endothermic.

1. When silver bromide is exposed to sunlight, it decomposes to silver metal which is grey in color and bromine gas are formed.

The balanced decomposition reaction will be,

[tex]2AgBr(s)\overset{sunlight}\rightarrow 2Ag(s)+Br_2(g) [/tex]

2. Water breaks down into hydrogen and oxygen when it is exposed to sunlight.

$H_2O \rightarrow H_2 +\frac {1}{2}O_2$

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