In which of the following reactions conc. H2SO4 is used as an oxidising reagent?

Choose the correct option
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)

Hint: Oxidising agent oxidized other, and itself gets reduced.

In the above given four reactions, (b) and (c) represent oxidizing behaviour of H2SO4 . As we know that oxidizing agent reduces itself as the oxidation state of the central atom decreases. Here,