1.

Osmotic pressure observed when benzoic acid is dissolved in benbzene is less than that expected from throretical considerations. This is because

Answer»

BENZOIC acid is an ORGANIC solute
benzoic acid has higher molar mass than benzene
benzoic acid gets ASSOCIATED in benzene
benzoic acid gets dissociated in benzene

Solution :Benzoic acid associates in benzene as `2C_(6)H_(5)COOH hArr (C_(6)H_(5)COOH)_(2)`
The number of particles decreases and hence osmotic pressure decreases.


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