Question: 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 electrictiy. [CBSE, 2018]
Answer: Decomposition of zinc carbonate, when heat is applied.
ZnCO₃ + Heat → ZnO + CO₂
Decomposition of water in presence of electricity:
2H₂O + Electricity → 2H₂ + O₂(g)
Decomposition of silver chloride in presence of light:
2AgCl + Sunlight → 2Ag + Cl₂ White Grey
