The volume strength of $3 N H_{2} O_{2}$ is:

16.8 V

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11.2 V

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8.4 V

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22.4 V

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Solution

The correct option is A $16.8 V$
3N means 3 g-equivalents in 1 L solution.
$3 = \frac{Weight}{Equivalent weight} = \frac{w}{17} w = 3 \times 17 = 51 g$
$2 H_{2} O_{2} \to 2 H_{2} O + O_{2}$
Now, from the equation, we know that 68 g of $H_{2} O_{2}$ gives 22.4 L of Oxygen.
Therefore, 51 g of hydrogen peroxide gives :
$22.4 \times \frac{51}{68} L = 16.8 L$
Thus, volume strength is 16.8 L, because volume strength is the volume of oxygen at STP given by one volume sample of hydrogen peroxide on heating.

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