Question

Identify the false statement:

• A. The volume of a solution cannot be less than the sum of volumes of the pure solvent and solute used to prepare the solution (binary solution of two liquids)
• B. At constant $T$ and $P , \Delta G _{\operatorname{mix}}$ will be necessarily negative for an ideal solution
• C. An ideal binary solution $\left(p_{A}^{0} \neq p_{B}^{0}\right)$ cannot form an azeotropic mixture.
• D. In binary solutions ideality is more of an exception rather than a rule.

Answer 1

Answer: (A)

(A) as in case of negative deviation.
(B) $\Delta G _{\operatorname{mix}}$ is generally positive.
(C) Ideal mixture follows Raoult's law at all compositions, so can not form a constant boiling mixture.
(D) It is theoretically impossible to obtain an ideal solution.