sblock Elements 1 Question 5
5. The strength of 11.2 volume solution of $\mathrm{H}{2} \mathrm{O}{2}$ is [Given that molar mass of
$\mathrm{H}=1 \mathrm{~g} \mathrm{~mol}^{-1}$ and $\mathrm{O}=16 \mathrm{~g} \mathrm{~mol}^{-1}$ ]
(a) $1.7 %$
(b) $34 %$
(c) $13.6 %$
(2019 Main, 8 April II)
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Solution:
- Saline or ionic hydrides produce $\mathrm{H}{2}$ with $\mathrm{H}{2} \mathrm{O}$.
$$ \stackrel{\oplus}{M} \stackrel{\oplus}{\mathrm{H}}+\mathrm{H}{2} \mathrm{O} \longrightarrow \mathrm{H}{2} \uparrow+M \mathrm{OH} $$
Thus, statement (1) is correct.
