Question

$10$mL of liquid 'A' is mixed with $10$mL of liquid 'B', the volume of the resultant solution is $19.9$mL. What type of deviation expected from Raoult's law?

Answer 1

Negative deviation is expected from Raoult's law.

Note: The volume of the resultant solution $<$ [ volume of liquid 'A' $+$ volume of liquid 'B' ]

Thus when two liquids are mixed, there is decrease in the volume.

This is characteristic of negative deviation from Raoult's law.