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Henry's Law

A binary liqu...

Question

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?

A

The solution formed is an ideal solution

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B

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

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C

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

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D

Normal-heptane exhibits positive deviations, whereas ethyl alcohol exhibits negative deviations from Raoult's law

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Solution

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

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Q. CASE1: Read the passage given below and answer the following question.

The solution which obeys Raoult’s law over the entire range of concentration are known as ideal solutions. The solution which does not obey Raoults law over the entire range of concentration, then it is called non-ideal solution. The vapour pressure of such as a solution is either higher or lower than that predicted by Raoult’s law. If it is higher, the solution exhibits positive deviation and if it is lower, it exhibits negative deviation from Raoult’s law.
Some liquids on mixing, form azeotropes which are binary mixture having the same composition in liquid and vapour phase. There are two types of azeotropes. Minimum boiling azeotropes and maximum boiling azeotropes.

Which of the following solutions show negative deviation from Raoult’s law?
[0.77 Mark]

Q. A solution of

C H C l_{3} + C H_{3} C O C H_{3}

shows negative deviation from Raoults law.

Q. CASE 1: Read the passage given below and answer the following question

The solution which obeys Raoult’s law over the entire range of concentration are known as ideal solutions. The solution which does not obey Raoults law over the entire range of concentration, then it is called non-ideal solution. The vapour pressure of such as a solution is either higher or lower than that predicted by Raoult’s law. If it is higher, the solution exhibits positive deviation and if it is lower, it exhibits negative deviation from Raoult’s law.
Some liquids on mixing, form azeotropes which are binary mixture having the same composition in liquid and vapour phase. There are two types of azeotropes. Minimum boiling azeotropes and maximum boiling azeotropes.

Correct statement(s) about azeotropes is/are:
[0.77 Mark]

Q. For a non-ideal solution exhibiting positive deviation from Raoult's law,

Δ_{m i x} H

has a ............... (nonzero)

Q. The vapour pressure of the solution of two liquids A

(p^{\circ} = 80 m m)

(p^{\circ} = 120 m m)

100 m m

χ_{A} = 0.4

. The result shows that:

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