Question

in which type of reaction does an exchange of ion take place

Answer 1

in double displaces reaction,the exchange of ions takes place between twice compounds to form two new compounds.
for example- $\bold{AgNO_3+Nacl---->AgCl+NaNO_3}$
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Answer 2

Answer:

In double displacement reaction exchange of ions take place..

Explanation:

 double displacement reaction, also known as a double replacement reactionor metathesis, is a type of chemical reaction where two compounds react, and the positive ions (cation) and the negative ions (anion) of the two reactants switch places, forming two new compounds or products.