Question

Which one of the following substances is a good oxidising agent?

• A. coke
• B. water
• C. Hydrogen peroxide
• D. Sulphur dioxide

Answer 1

Answer: (C)

Hydrogen peroxide

A good oxidizing agent is one which can readily oxidize other chemical species and reduce itself. Therefore, the compound which is good oxidizing agent must have initial oxidation as high, so that it can reduce its oxidation state and get reduced and oxidize others.

$Coke:$ Reducing agent

$Hydrogen$ $peroxide$ $\left(H_2{O}_2\right):$ because oxidation state of oxygen is -1 in hydrogen peroxide. So, it oxidizes to 0 & acts as a reducing agent & it reduces to -2 & acts as an oxidizing agent. But, generally, it acts as an oxidizing agent because a stable oxidation state of oxygen is -2(oxide form)

$H_{2}O:$ Reducing agent.

$S{O}_2$: sulfur in the +4 oxidation state, sulfur dioxide is a reducing agent. It is oxidized by halogens to give the sulfuryl halides, such as sulfuryl chloride

Hence, the correct option is $\text{C}$