Question

In the reaction $2Ag+\underset{conc.}{2H_{2}S{O}_4}\to A{g}_{2}S{O}_4+2H_{2}O+S{O}_2$ sulphuric acid acts as:

• A. an oxidising agent
• B. a reducing agent
• C. a catalyst
• D. an acid as well as oxidant

Answer 1

The correct option is A an oxidising agent

$2Ag+\underset{conc}{\stackrel{6}{2H_{2}S{O}_4}}⟶\stackrel{4}{A{g}_{2}S{O}_4}+2H_{2}O+S{O}_2$

$\downarrow$ $\uparrow$

{Decrease in oxidation number: Reduction}

Since, it undergoes reduction, hence, it acts as an oxidising agent.