Question

Which of the following cannot be oxidised by $H_{2}O_{2}$.

• A. $O_{3}$
• B. $KI/HCl$
• C. PbS
• D. $Na_{2}SO_{3}$

Answer 1

Answer: (A)

$O_{3}$

Answer 2

$H_{2}O_{2}$ reduces $O_{3}$ to $O_{2}$

$O_{3} + H_{2}O_{2} \rightarrow H_{2}O + 2O_{2}$