Question

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

Answer 1

1) Reaction in presence of heat : Decomposition of calcium carbonate that gives calcium oxide and carbon dioxide.
The reaction is :
CaCO₃ $\stackrel{\text{Heat}}{\to }$ CaO + CO₂
2) Reaction in presence of light : Decomposition of silver chloride gives silver and chlorine . The reaction is :
2AgCl $\stackrel{\text{Sunlight}}{\to }$ 2Ag + Cl₂
3) Reaction is presence of electricity : Decomposition of water gives hydrogen and oxygen. The reaction is :
2H₂O $\stackrel{\text{Electricity}}{\to }$ 2H₂ + O₂