1. Thermal decomposition reaction: (In the presence of heat)
CaCO3(s)→CaO(s)+CO2(g) [1 Mark]
2. Photolytic decomposition reaction: (In the presence of sunlight)
2AgCl(s)→2Ag(s)+Cl2(g) [1 Mark]
3. Electrolytic decomposition reaction: (In the presence of electricity)
2H2O(l)→2H2(g)+O2(g) [1 Mark]