Question

The reaction in which more reactive element displaces the less reactive element from its compound is called:

• A. combination reaction
• B. displacement reaction
• C. decompositon reaction
• D. precipitation reaction

Answer 1

The correct option is B displacement reaction

In a displacement reaction, a more reactive element displaces the less reactive element from its compound or salt solution. The general representation of this reaction is:

$\text{A}+\text{BC}\to \text{AC}+\text{B}$

Iron reacting with copper sulphate solution to form iron (ii) sulphate solution along with copper is an example of a displacement reaction in which iron being more reactive displaces copper. The reaction involved is given below:

$\text{Fe(s)}$ + ${\text{CuSO}}_4\text{(aq)}$ $\to$ ${\text{FeSO}}_4\text{(aq)}$ + $\text{Cu(s)}$