Question

plz help me to and answer this question​

Answer 1

Thermal decomposition is a chemical reaction where a single substance breaks into two or more simple substances when heated.

CaCO3--->CaO+CO2

Photo decomposition is a chemical reaction in which a substance is broken down into simple substances by exposure to light (photons).

2H2O2⟶2H2O+O2

Electrolytic decomposition may result when the electric current is passed through an aqueous solution of a compound.

2H2O(l) ⟶2H2(g)+O2(g)

Answer 2

Answer:

Decomposition reaction:1) Heat =CaCO3-CaO+CO2

Decomposition reaction :2) light

= 2AgCl-2Ag+Cl2

Decomposition Reaction :3) electricity

2H2O-2H2+O2