Question

Define 1.Decomposition reaction 2.Combination reaction 3.Displacement reaction 4. Double displacement reaction. with clear examples.

Answer 1

1. decomposition reactions are chemical reactions in which a compound decomposes to give two new elements
eg.2Hgo gives 2Hg+O2


2.combination reactions are a chemical reaction in which two or more elements combine to form a compound
eg.C+O2 gives CO2


3.displacement reaction are chemical reaction which takes place when an element has replaced another element in a compound

eg.Zn+CuSO4 gives ZnSO4+ Cu