Write an equation for decomposition reaction where energy is supplied in the form of Heat / light / electricity.

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Solution

Decomposition by heat,
$C a C O_{3} h e a t ⟶ C a O + C O_{2}$
Decomposition by light or photolysis,
$2 A g C l \to 2 A g + C l_{2}$
Decomposition by electricity,
$2 H_{2} O \to 2 H_{2} + O_{2}$

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