Question

when will displacement reaction happens explain with example

Answer 1

Displacement reaction is a chemical reaction in which a more reactive element displaces a less reactive element from its compound. Both metals and non-metals take part in displacement reactions. Iron displacing copper in Copper Sulphate solution to form Iron Sulphate is one most common examples.

Answer 2

when there will be two reactants react each other if the higher reactive metal displace lower reactive metal from its compound then it is known as displacement reaction
e.g
fe +cuso4 ------->fe2(so4)3 + cu