A binary liquid solution of n-heptane and ethyl alcohol is prepared. Which of the following statements correctly represents the behaviour of this liquid solution?

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The solution formed is an ideal solution.

The solution formed is a non-ideal solution with positive deviations from Raoult's law.

The solution formed is non-ideal solution with negative deviations from Raoult's law.

Normal-heptane exhibits positive deviations, where as ethyl alcohol exhibits negative deviations from Raoult's law.

answer is B.

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Detailed Solution

Inter molecular forces among molecules of n-heptane and ethyl alcohols are weaker than among hexane and among ethyl alcohol molecules ∴ Vapour pressure of solution is more than Vapour pressure of pure solvents.

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