Which statements are true for an ideal binary solution of A and B?

A $Δ H_{mix} = 0$
B $Δ V_{mix} = 0$
CThe A-B intermolecular attraction is weaker than the A-A and B-B attractions
DRaoult's law is obeyed by both components over the entire composition range

Answer: A, B, D

An ideal solution has A-B interactions similar in strength to A-A and B-B interactions, so no heat or volume change occurs on mixing. This also means both components follow

p_{i} = x_{i} p_{i}^{0}

at all compositions. Weaker A-B attraction is the origin of positive deviation, not ideality. Answer: 1, 2 and 4.

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Which statements are true for an ideal binary solution of A and B?

Answer: A, B, D

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