Question

What is decomposition reaction?

Answer 1

Reactions in which one compound decomposes in two or more compounds or element are known as DECOMPOSITION REACTION. Decomposition reaction is just opposite of combination reaction.

Example:

1)When calcium carbonate is heated, it decomposes into calcium oxide and carbon dioxide

CaCO3→CaO+CO2

Calcium carbonate \rightarrow Calcium oxide + Carbon dioxide

2)When ferric hydroxide is heated, it decomposes into ferric oxide and water

2Fe(OH)3→Fe2O3+3H2O

Ferric hydroxide \rightarrow Ferric oxide + Water

3)When lead nitrate is heated, it decomposes into lead oxide, nitrogen dioxide and oxygen.

2Pb(N03)2→2PbO+4NO2+O2