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Q.

Statement I : Greater the value of Vander Waals constant ‘a’ greater is the liquification of gas.

Statement II : ‘a’ indirectly measures the magnitude of attractive forces between the molecules.

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a

Statement I and II are correct and II explains I

b

Statement I and II are correct and II does not explain I

c

Statement I is correct and statement - II is incorrect

d

Both statement - I and II are incorrect

answer is A.

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Detailed Solution

'a' is measure of inter molecular forces.Stronger the intermolecular forces 'a' value is higher easier is liquefaction of gas.

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Statement I : Greater the value of Vander Waals constant ‘a’ greater is the liquification of gas. Statement II : ‘a’ indirectly measures the magnitude of attractive forces between the molecules.