Which of the following act as an oxidising as well as a reducing agent?

CHEMISTRY · Single correct · A Level · Chemistry · Oxidation, reduction and redox reactions · Oxidation, reduction and redox reactions

Problem

Which of the following act as an oxidising as well as a reducing agent? (1)

\text{HNO}_2

(2)

\text{H}_2\text{O}_2

(3)

\text{H}_2\text{S}

(4)

\text{SO}_2