1.

Vapour pressure of solution containing 2 mol of liquid A (P_A^@ = 80 torr) and 3 mol of liquid B (P_B^@= 100 torr) is 87 torr. We canconclude that

Answer»

there is negative deviation from RAOULT's law
boiling POINT is higher than that EXPECTED for ideal solution
molecular attractions between unlike molecules arestronger than those between like molecules
all of these statements are correct

Solution :For ideal solution vapour pressure of solution `=P_A^@x_A + P_B^@x_B`
`80xx2/5 + 100 xx3/5 = 92` torr
Since observed vapour pressure of solution >ideal vapour pressure, the solution shows negative deviation.


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