Question

what are photo decomposition reaction and what are electrolytic decomposition reaction

Answer 1

# Photo Decomposition reaction
When the decomposition reaction is carried out with the help of light energy
is called Photo Decomposition reaction

#Electrolytic Decomposition reaction
When the decomposition reaction is carried out with the help of electrical energy it is called Electroloytic Decomposition reaction

Answer 2

Photo Decomposition - The decomposition reactions which are performed in the presence of a source of light such as sunlight are called Photo Decomposition Reactions.

eg: Decomposition of Silver Chloride which is used in photography.

2AgCl = 2Ag + Cl2

Electrolytic Decompostion - The decompostion reactions which are performed by passing electric current are called Electrolytic Decomposition Reactions.

eg: Decomposition of water by electrolysis in which hydrogen is liberated at cathode and oxygen at anode.

2H2O = 2H2 + O2