Question

In double displacement reactions _______ are exchanged by the reactants.

• A. ions
• B. compounds
• C. molecules
• D. atoms

Answer 1

The correct option is A

ions

In double displacement reactions, ions are exchanged by the reactants.

Example: $N{a}_{2}S{O}_4\left(aq\right)+BaC{l}_2\left(aq\right)\to BaS{O}_4\left(s\right)+2NaCl\left(aq\right)$.

The reactants $N{a}_{2}S{O}_4$ and $BaC{l}_2$ exchange their cations to form $BaS{O}_4$ , $NaCl$.