Question

The substance A when dissolved in solvent B shows the molecular mass corresponding to $A_3$. The van’t Hoff factor will be

• A. 1
• B. 2
• C. 3
• D. 1/3

Answer 1

Answer: (D)

$\underset{1-\alpha }{3A}\to \underset{\alpha /3}{A_3}$
$i=1-\alpha =\alpha /3$
$(\alpha =100\%)$
$=1-1+\frac{1}{3}=\frac{1}{3}$