Question

define double displacement reaction

Answer 1

the chemical reaction in which one component each of both the reacting molecules get exchanged to form the products. this means that double displacement has taken place

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Answer 2

$<marquee>$ 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)