Question

When sulphur reacts with conc. sulphuric acid, it acts as a:

• A. reducer
• B. oxidiser
• C. both of them
• D. none of them

Answer 1

The correct option is A reducer

A redox reaction takes place between thesulfur and sulfuric acid, forming sulphur dioxide and water.

$S+2H_{2}S{O}_4\to 3S{O}_2+2H_{2}O$

Sulphur is oxidised to sulphur dioxide by hot and concentrated sulphuric acid, and the acid also gets reduced to the same product (sulphur oxide) by sulphur.

So $H_{2}S{O}_4$ is reduced. So sulfur is a reducer.

Hence option D is correct.