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Explain giving examples the term 'collig...

Explain giving examples the term 'colligative molality'. Why do we sometimes get abnormal molecular masses of the substances using colligative properties of the solution? The freezing point depression of `0.1` molal solution of benzoic acid in benzene is `0.526K`. For benzene `K_(f)` is `5.12K kg "mol"^(-1)`. Calculate the value of van't Hoff factor for benzoic acid in benzene. What conclusion can you draw about the molecular state of benzoic acid in benzene?

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Assertion: van't Hoff factor for benzoic acid in benzene is less than one Reason: Benzoic acid behave as a weak electrolytein benzene.