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Non-Ideal Solutions

When two liqu...

Question

When two liquids A and B are mixed, their boiling points become greater than both of them. The mixture is:

A

ideal solution

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B

non-ideal solution with negative deviation from Raoult's law

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C

non-ideal solution with positive deviation from Raoult's law

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D

normal solution

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Solution

The correct option is D non-ideal solution with positive deviation 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. 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.

Incorrect thermodynamic relation for ideal solution is:
[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.

When two liquids A and B are mixed then their boiling points becomes greater than both of them. What is the nature of this solution?

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

(P^{0} = 80 m m o f H g a n d X_{A} = 0.4)

(P^{0} = 120 m m o f H g a n d X_{B} = 0.6)

is observed to be 100 mm of Hg. It shows that the solution exhibits:

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