Question

define double displacement reaction????

Answer 1

The reaction in which two different ions or groups of atom in the reactants molecules are displaced by each other is called double displacement reaction..

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Answer 2

$\huge\underline\mathfrak\pink{Double\:Displacement\:reaction}$

It is nothing but the displacement of two ions.

General equation :

AB + CD → AD + CB

Example :

CuCl 2(aq) + 2 AgNO 3(aq) → Cu(NO 3) 2(aq) + 2 AgCl(s)