Decomposition reactions require energy either in the form of heat or light or electricity

• Chemical Reactions & Equations (C10)

Decomposition reactions require energy either in the form of heat or light or electricity for breaking down the reactants. Write one equation each for decomposition reactions where energy is supplied in the form of heat, light and electricity.

Answer

Decomposition reactions with heat

CaCO₃ → CaO + CO₂

2FeSO₄ → Fe₂O₃ + SO₂ + SO₃

2Pb(NO₃)₂→ 2PbO + 4NO₂ + O₂

Decomposition reactions with light

2AgCl → 2Ag + Cl₂

2AgBr→ 2Ag + Br₂

Decomposition reactions with electricity

2H₂O→ 2H₂ + O₂