Question

A solution containing `4 g` of a non-volatile organic solute per `100 mL` was found to have an osmotic pressure equal to `500 cm` of mercury at `27^(@)C`. The molecular weight of solute is
A. 14.97
B. 149.7
C. 1697
D. 1.497

Answer 1

Correct Answer - B
`pi V = W_(2)/M_(2)RT,`
`500/76 xx 100/1000 = 4/M_(2) xx 0.0821 xx 300,`
`M_(2) = 149.6`