A 0 . 120 molal solution of CsCl [ with ionizes in the solution as CsCl ⇌ Cs + + Cl - ] freezes at - 0…

A $0.120$ molal solution of $\mathrm{CsCl}$ $[$with ionizes in the solution as $\mathrm{CsCl}\rightleftharpoons {\mathrm{Cs}}^{+}+{\mathrm{Cl}}^{-}$$]$ freezes at $-0.4°\mathrm{C}.$ The Van't Hoff factor and degree of dissociation of $\mathrm{CsCl}$ in the solution, respectively, are

$($Given ${\mathrm{K}}_{\mathrm{f}}\left(\mathrm{water}\right)=1.86 \mathrm{K} \mathrm{kg} {\mathrm{mol}}^{-1}$$)$