JEE Main & Advanced Chemistry Some Basic Concepts of Chemistry / रसायन की कुछ मूलभूत अवधारणाएँ Question Bank Topic Test - Some Basic Concepts of Chemistry

The volume of concentrated sulphuric acid which is 98% by mass (density \[=1.84\,g\,c{{m}^{-3}}\]) required to prepare \[5\,d{{m}^{3}}\] of \[0.5\text{ }mol\text{ }d{{m}^{-3}}\] solution of sulphuric acid is

A) 272 mL

B) 68 mL

C) 136 mL

D) 204 mL

Correct Answer: C

Solution :

[c] Molarity of given sulphuric acid

\[=\frac{98}{98}\times \frac{1.84}{100}\times 1000=18.4\,mol\,d{{m}^{-3}}\]

\[{{M}_{1}}{{V}_{1}}={{M}_{2}}{{V}_{2}}\]

\[{{V}_{1}}=\frac{0.5\times 5}{18.4}=0.136\,d{{m}^{3}}=136\,mL\]