Select the incorrect statement :

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Problem

Select the incorrect statement : (1) If

\Delta T

is depression in freezing point and

m

is molality, then

\left( \lim_{T \to 0} \frac{\Delta T}{m} \right) = \text{molal depression constant}

(2) On dissolution of Fe in aqueous HCl, work is done by the system (3) Osmosis is bilateral process (4) For isotonic solutions

C_1

must be equal to

C_2