Question

Question 35
Which of the following can undergo a chemical reaction?
(a) ${\text{MgSO}}_4+\text{Fe}$
(b) ${\text{ZnSO}}_4+\text{Fe}$
(c) ${\text{MgSO}}_4+\text{Pb}$
(d) ${\text{CuSO}}_4+\text{Fe}$

Answer 1

Option (d) is correct.

Iron, ($\text{Fe}$) being more reactive than copper, will displace it from its solution, to form iron sulphate solution.

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

In other cases, the solutions are of more reactive metal.