Question

in which type of reaction does and exchange of partners take place?

Answer 1

Displacement reaction
Like
CuSO4+ Fe changes to FeSO4+Cu

Other type is double displacement reaction
Like
HCl and NaOH react to form NaCl and H2O

Answer 2

Answer:

Double decomposition reaction involves the exchange of partners.

Explanation:

It is a reaction between two compounds that exchanges the one part of a chemical compound with another part of a chemical compound to form two new chemical compounds.

$\bold{\mathrm{AB}+\mathrm{CD} \rightarrow \mathrm{CB}+\mathrm{AD}}$

For example,

$\bold{\mathrm{BaCl}_{2}+\mathrm{Na}_{2} \mathrm{SO}_{4} \rightarrow \mathrm{BaSO}_{4}+2 \mathrm{NaCl}}$

In this reaction, the cations $Ba^{2+}$ and $Na^{+}$ of the reactants interchanges their partner’s $Cl^{-}$ and $SO_{4}^{-}$ respectively to from two new chemical compounds.