Question

Which of the following statements about the given reaction are correct? $\text{MnO}_2 + 4\text{HCl} \rightarrow \text{MnCl}_2 + \text{Cl}_2 + 2\text{H}_2\text{O}$ (i) $\text{MnO}_2$ is getting reduced. (ii) $\text{HCl}$ is getting oxidised. (iii) $\text{MnO}_2$ acts as an oxidising agent. (iv) $\text{MnO}_2$ acts as a reducing agent.

A.
(i), (ii) and (iii)
B.
(iii) and (iv)
C.
(i), (ii) and (iv)
D.
(ii) and (iv)

Accepted Answer

A. $	ext{MnO}_2$ loses oxygen to form $	ext{MnCl}_2$, so it is reduced (and acts as an oxidising agent). $	ext{HCl}$ loses hydrogen to form $	ext{Cl}_2$, so it is oxidised.

Oxidation and reduction in MnO2 + HCl reaction

Explanation

Practise this under board exam conditions