Q. A solute 'A' undergoes association in a medium as
$nA\rightleftharpoonsA_{n}$
The degree of association is $'\alpha '$ , then van't Hoff factor may be give as

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A

$i=1-\alpha $

B

$i+1+\frac{\alpha }{n}$

C

$i=\frac{1 - \alpha + \frac{\alpha }{n}}{1}$

D

i = 1

Solution:

In case of association, $\alpha $ and i can be related as follows
$\alpha =\frac{1 - i}{1 - \frac{1}{n}}$
So $i=\frac{1 - \alpha + \frac{\alpha }{n}}{1}$

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