$\pi_{ K _2 SO _4}=\pi_{ Glucose }$
$i \times 0.004 \times RT =0.01 \times RT$
$i =2.5$
For $K _2 SO _4 \quad\{$ for dissociation $i =1+( n -1) \alpha\}$
$\operatorname{DOD}(\alpha)=\frac{ i -1}{ n -1}=\frac{2.5-1}{3-1}=0.75$
$\%$ dissociation $=75$
$\left[\right.$ આપેલ છે $\left.: {K}_{{f}}\left({H}_{2} {O}\right)=1.86\, {~K}\, {~kg}\, {~mol}^{-1}\right]$