0.5g KCl was dissolved in 100g water and the solution originally at $20^{\large\circ}C$,froze at $-0.24^{\large\circ}C$.Calculate the percentage ionization of salt.$(K_f$ per 1000g of water =1.86K)

Question

$\begin{array}{1 1}92\%\\82\%\\72\%\\62\%\end{array}$