Question

Moist hydrogen peroxide cannot be dried over conc. H2SO4 because:

• A. It can catch fire.
• B. It is reduced by H2SO4.
• C. It is oxidised by H2SO4.
• D. None of these

Answer 1

Answer: (C)

It is oxidised by H2SO4.

Answer 2

H2O2 can not be dried over conc. H2SO4 because it oxidises by H2SO4

H2SO4 $\longrightarrow$ H2O + SO2 + O

H2O2 + O $\longrightarrow$H2O + O2

$H_{2}SO_{4} + H_{2}O_{2}\overset{\quad\quad}{\rightarrow}2H_{2}O + SO_{2} + O_{2}$