Statement - I : If two liquids on mixing form a solution with liberation of heat, it is a non ideal solution with negative deviation.
Statement - II : Solutions with negative deviation are accompanied by decrease in volume.

On mixing liquid X and liquid Y, the volume of the resulting solution decreases means it is Negative deviation of Raoult's law. There is an elevation of boiling point occurs i. e., the temperature of the solution increase it means δH=−ve. So it is an exothermic reaction.