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Raoult's Law

Binary liquid...

Question

Binary liquid mixtures which exhibit positive deviations from Raoult's law boil at temperature ______ than the expected boiling point:

A

Lower

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B

Higher

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C

Same

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D

Con't be said

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Solution

The correct option is A
Lower

When a mixture of 2 liquids exhibit positive deviation, the attractive force between the liquids is less and hence show high vapour pressure than expected. They boil at lower temperature than expected.

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Similar questions

Q. Which one of the following binary liquid mixture exhibit positive deviation from Raoult's law ?

Q. The boiling point of a binary immsicible liquid mixture :

Which of the following liquid pairs shows a positive deviation from Raoults law?

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.

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

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