Answer :
(i) On mixing X and Y, if the volume of the solution decreases, it means that the interaction between the X-X and Y-Y molecules reduces and the intermolecular interactions between X and Y increase. This leads to negative deviation of Raoult’s law. Due to the decrease in vapour pressure, the boiling point of the solution increases.
(ii) When a blood cell is placed in water, which is a hypotonic solution compared to the solution in the blood cell, due to osmosis, the water penetrates into the blood cell and blood cell bulges and get disrupted.
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