Question

Which of the following molecules can act as an oxidizing as well as a reducing agent?

• A. $H_{2}S$
• B. $S{O}_3$
• C. $H_2{O}_2$
• D. $F_2$

Answer 1

The correct option is C $H_2{O}_2$

Hydrogen peroxide exhibits oxidizing and reducing properties, depending on $pH$. In acidic solutions, $H_2{O}_2$ is one of the most powerful oxidizers known—stronger than chlorine, chlorine dioxide, and potassium permanganate. Also, through catalysis, $H_2{O}_2$ can be converted into hydroxyl radicals ${(}^{.}OH)$, which are highly reactive. In basic solution, hydrogen peroxide can reduce a variety of inorganic ions. When it acts as a reducing agent, oxygen gas is also produced.