Write one example for each of the decomposition reactions carried out with the help of:
$(i)$ electricity
$(ii)$ heat
$(iii)$ sunlight
Give balanced chemical equations in each case.

(N/A) $(i)$ Electricity (Electrolytic decomposition):
$2H_{2}O(l) \xrightarrow{\text{Electric current}} 2H_{2}(g) + O_{2}(g)$
$(ii)$ Heat (Thermal decomposition):
$CaCO_{3}(s) \xrightarrow{\text{Heat}} CaO(s) + CO_{2}(g)$
$(iii)$ Sunlight (Photolytic decomposition):
$2AgCl(s) \xrightarrow{\text{Sunlight}} 2Ag(s) + Cl_{2}(g)$