Question

Which type of binary solution shows positive deviation of raoult's law?

Answer 1

If the vapour pressure is higher, then the solution is said to exhibit a positive deviation from Raoult’s law. A mixture of ethanol and acetone is an example of a solution that shows a positive deviation from Raoult’s law.

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Answer 2

• A binary liquid (AB) shows positive deviation from Raoult's law when PA>PoAχliquidA and PB>PoBχliquidB, Intermolecular forces A−A,B−B>A−B, △Vmix>0 and △Hmix>0. The correct options are (A), (B), (C) and (D). Note: There is no solution mixture in the real world which is completely ideal.

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