Question

$510$ milli $gm$ of a liquid on vapourisation in Victor Mayer's apparatus displaces $510c.c.$ of dry air (at NTP). The molecular weight of liquid is?

• A. $0.224$
• B. $2.24$
• C. $224$
• D. $22.4$

Answer 1

Answer: (D)

$22.4$

Mol Wt. of the Liquid = $\frac{\text{mass of the liquid}}{\text{Volume at N.T.P}}\times 22400$

Mol Wt. of the Liquid = $\frac{510\times {10}^{-3}}{510}\times 22400$

Mol Wt. of the Liquid = 22.4