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JEE Main 202528 JanuaryEvening Shift

Exam: JEE Main
Year: 2025
Date: 28 January
Shift: Evening Shift
Subject: Chemistry
Chapter: Some Basic Concepts of Chemistry

JEE Main 2025 · 28 January · Evening Shift · Chemistry · Some Basic Concepts of Chemistry

Concentrated nitric acid is labelled as 75 \% by mass. The volume...

Concentrated nitric acid is labelled as

75 \%

by mass. The volume in mL of the solution which contains 30 g of nitric acid is ____. Given : Density of nitric acid solution is

1.25 \mathrm{~g} / \mathrm{mL}

.

Options

A $40$
B $32$
C $45$
D $55$

Correct answer

B. $32$

Step-by-step solution

75 \%

by mass means :

\because \quad 75 \mathrm{~g} \mathrm{HNO}_3

in 100 g solution.

\therefore \quad 30 \mathrm{~g} \mathrm{HNO}_3 in \frac{100}{75} \times 30 \mathrm{~g}

solution.

\begin{aligned} & \mathrm{m}_{\text{solution }}=\frac{100 \times 30}{75} \mathrm{~g} \\ \because \quad & \mathrm{~V}_{\text{sol }}=\frac{\mathrm{m}_{\text{sol }}}{\mathrm{d}_{\text{sol }}}=\frac{100 \times 30}{75 \times 1.25}=32 \mathrm{~mL} \end{aligned}

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