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Non-Ideal Solutions

A solution ha...

Question

A solution having $Δ H_{m i x}$ =+ve will exhibit ________ deviation from ideal behaviour.

A

negative

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B

positive

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C

no

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D

depends upon the properties of the mixing components

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Solution

The correct option is C positive
A solution having $Δ H_{m i x}$ = positive will exhibit positive deviation from ideal behaviour. The observed vapour pressure of each component and the total vapour pressure are greater than predicted by Raoult's law. The new interactions are weaker than those in pure components. Examples include acetone + ethyl aclohol, chloroform + carbon tetrachloride and ethanol + chloroform.

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

Δ_{m i x} H

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

Q. What is the value of

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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?
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In mixture A and B components show -ve deviation as:

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]

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