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Q. Strength of $10$ volume hydrogen peroxide solution means

Hydrogen

Solution:

$\underset{\text{68 g}}{2H_2O_2}\to 2H_2O +\underset{\text{22.4 L at STP}}{O_2}$
$22.4\, L\, O_2$ is given by $68\,g$ of $H_2O_2$
$10\, L\, O_2$ is given by $\frac{68}{22.4} \times 10$
$=30.35\,g\,L^{-1}$