Question

Which of the following acts as both oxidising agent as well as reducing agent?

• A. $LiAl{H}_4$
• B. $H_2{O}_2$
• C. $N{a}_2{S}_2{O}_3$
• D. None of these

Answer 1

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

Only $H_2{O}_2$ acts as both good reducing and oxidising agent. While a and c are the strong reducing agent they does not acts as oxidising agent.

As a reducing agent,
$H_2{O}_2\to O_2+2e^{-}+2H^{+}$

As an oxidising agent,
$H_2{O}_2+2H^{+}+2e^{-}\to 2H_{2}O$