What is called double displacement reaction? Give examples. - Vidyadip

Question

What is called double displacement reaction? Give examples.

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Answer

Chemical reaction in which two reactants react by exchange of ions is called double displacement reaction.
Examples:
$\text { (1) } \begin{aligned}
Na_2 SO_4(aq)+ & BaCl_2(aq)\longrightarrow BaSO_4(s)+2 NaCl(aq)
\end{aligned}$
$\text { (2) } 2 KBr(aq)+BaI_2 \text { (aq) } \longrightarrow BaBr_2 \text { (s) }+2 KI(aq)$

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