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A solution of 10 g of non-volatile binary electrolyte (mol wt=100) in 500 g of water freezes at $-0.74^{\circ}C$. What is the degree of ionisation ? ($k_f$ of water$=1.85\;K \; molality^{-1})$

\[\begin {array} {1 1} (a)\;50\% & \quad (b)\;75\% \\ (c)\;100\% & \quad (d)\;0\% \end {array}\]
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$(c)\;100\% $
answered Nov 7, 2013 by pady_1
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