Question

Which compound acts as oxidising as well as reducing agent?

• A. $S{O}_2$
• B. $Mn{O}_2$
• C. $A{l}_2{O}_3$
• D. $Cr{O}_3$

Answer 1

Answer: (A)

$S{O}_2$

$S{O}_2$ acts both oxidizing agent and reducing agent. In $S{O}_2$ sulphur loses 4 electrons to oxygen and forms +4 oxidation state and as it has 6 valence electrons it has the ability to gain 2 electrons and forms -2 oxidation state. So it has the ability to donate and gain the electrons so it acts like both oxidizing and reducing agent.

Hence option A is correct.