Write one equation each for the decomposition reactions where energy is supplied in the form of heat, light, or electricity.

The reactions in which a compound decomposes or splits up into two or more simpler substances when energy is provided to it is known as decomposition reactions.

$CaCO_{3}\xrightarrow{Heat} CaO + CO_{2}$

Decomposition reaction when the heat is supplied- decomposition of lead nitrate.

$2Pb( NO_{3})_{2}\xrightarrow{heat} \ 2PbO\ +\ 4NO_{2\ } +\ O_{2}$

 Decomposition reaction when light is supplied- decomposition of silver chloride.

$2AgCl\ \xrightarrow{light} \ 2Ag\ +\ Cl_{2}$

 Decomposition reaction where electricity is supplied- decomposition of acidified water.

$2H_{2} O\xrightarrow{electricity} \ 2H_{2} \ +\ O_{2}$