Question

Why displacement reaction and double displacement reaction definition?

Answer 1

Displacement reaction - a reaction in which a more reactive metal displaces a less reactive metal

Example - Fe + CuSO4 --> FeSO4 + Cu

Double displacement reaction - reaction in which mutual exchange of ions takes place between the respective reactants.

Example - Na2SO4 + BaCl2 --> BaSO4 + NaCl

Answer 2

$\huge\star\bold\red{Hello!}$

$\large\sf\green{Displacement\:Reaction:-}$

Those reactions in which is more reactive element displaces with less reactive elements from its compound. Such reaction is called as displacement reaction.

Ex- Fe + CuSO4 $\longrightarrow$ FeSO4 +Cu

$\large\sf\purple{Double\:Displacement\:Reaction:-}$

The reaction to which there is exchange of ions between the reactants are called as double displacement reaction.

Ex- Na2SO4 + BaCl2 $\longrightarrow$ BaSO4 + 2NaCl