Question

In which of the following reactions, there is no change in valency ?

• A. ${4 KClO3 -> 3KClO4 + KCl }$
• B. ${SO2 + 2H2S -> 2H2O + 3S }$
• C. ${ BaO2 + H2SO4 -> BaSO4 + H2O2}$
• D. ${ 3 BaO + O2 -> 2 BaO2}$

Answer 1

Answer: (C)

${ BaO2 + H2SO4 -> BaSO4 + H2O2}$

Answer 2

$BaO _{2}+ H _{2} SO _{4} \rightarrow BaSO _{4}+ H _{2} O _{2}$
as we know oxygen in peroxide is hare $-1$ oxidotion.
SO, $BaO _{2}$ and $H _{2} O _{2}$ are peroxide have $-1$ oxidation in oxygen.