Question

Which of the following can act as oxidising as well as reducing agent?

• A. $O_3$
• B. $HN{O}_3$
• C. $S{O}_2$
• D. $H_2{O}_2$

Answer 1

Answer: (C), (D)

The correct options are
C $S{O}_2$
D $H_2{O}_2$

Substance can acts as both oxidizing as well as reducing agent when a metal atom is present in its intermediate step.

$O_3$ can acts as only oxidizing agent due to its unstable nature and decomposes to give nascent oxygen.

$HN{O}_3$:Nitrogen is present in its highest oxidation state i.e.,+5 so it can act as only oxidizing agent.

$S{O}_2$:Sulphur is present in +4 oxidation state so it can act as both oxidizing as well as reducing agent.

$H_2{O}_2$:Oxygen is present in -1 oxidation state so it can act as both oxidizing as well as reducing agent.