Some Basic Concepts of Chemistry - Result Question 8
8. The volume strength of $1 M H _2 O _2$ is
(Molar mass of $H _2 O _2=34 g mol^{-1}$ )
(2019 Main, 12 Jan II)
(a) 16.8
(b) 22.4
(c) 11.35
5.6
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Answer:
Correct Answer: 8. (c)
Solution:
Concentration of $H _2 O _2$ is expressed in terms of volume strength,
i.e. “volume of $O _2$ liberated by $H _2 O _2$ at NTP”. Molarity is connected to volume strength as:
Molarity $(M)=\dfrac{x}{22.4}$ or $x=$ Molarity $\times 22.4$
where, $x=$ concentration
So, for $1 M H_2 O_2$, $x=1 \times 11.2=11.2$
Among the given options, 11.35 is nearest to 11.3.
BETA
