The solution of sulphuric acid contains 80% by weight $H_{2} {SO}_{4} .$ Specific gravity of this solution is 1.71. Its normality is about

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18.0

27.9

1.0

10.0

answer is B.

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Detailed Solution

$\begin{array}{l} N = \frac{10 \times sp . gr . of the solution \times wt . % of solute}{Eq . wt .} \\ N = \frac{10 \times 1 .71 \times 80}{49} = 27 .9 \end{array}$

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