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Question

Given, Van der waals equation for non-ideal gas
(P+an2V2)(V−nb)=nRT
The term that correctly describes intermolecular forces of attraction between the molecules is:

A
b
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B
RT
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C
an2V2
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D
(RT)1
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Solution

The correct option is C an2V2
As pressure of a real gas or non-ideal gas is lower (compare to ideal) due to the significant intermolecular forces of attraction between the molecules. So a pressure correction term which is aV2 added in the equation so,
Pcorrection=(an2V2)
a= van der Waal constant and depend on nature of gas
and the van der Waal equation is
(P+an2V2)(Vnb)=nRT

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