Question

Explain the difference between displacement and double displacement reactions with equations.

Hint:

{Displacement Reaction → One element replaces another.
{Double Displacement Reaction → Exchange of ions between two compounds.

Answer 1

Concept: Chemical reactions are classified into different types based on the way reactants form products. Two important types are displacement reactions and double displacement reactions.
Step 1:Displacement Reaction A displacement reaction is a chemical reaction in which a more reactive element displaces a less reactive element from its compound. Example: \[ Zn + CuSO_4 \rightarrow ZnSO_4 + Cu \] In this reaction, zinc displaces copper from copper sulphate because zinc is more reactive.
Step 2:Double Displacement Reaction A double displacement reaction is a chemical reaction in which two compounds react and exchange their ions to form two new compounds. Example: \[ Na_2SO_4 + BaCl_2 \rightarrow BaSO_4 + 2NaCl \] In this reaction, the ions of sodium sulphate and barium chloride exchange to form barium sulphate and sodium chloride.
Step 3:Main Differences \begin{center \begin{tabular{|c|c|c| \hline Feature & Displacement Reaction & Double Displacement Reaction
\hline Number of compounds involved & One element and one compound & Two compounds
\hline Process & One element replaces another & Exchange of ions between compounds
\hline Example & \(Zn + CuSO_4 \rightarrow ZnSO_4 + Cu\) & \(Na_2SO_4 + BaCl_2 \rightarrow BaSO_4 + 2NaCl\)
\hline \end{tabular \end{center