JEE Main Chemistry question

**Assertion:** Van der Waals forces are directly proportional to the ionisation potentials. **Reason:** Van der Waals forces increase as the size and diffuseness of the electron clouds increases.

(A)Assertion is True, Reason is True; Reason is correct explanation for Assertion
(B)Assertion is True, Reason is True; Reason is not correct explanation for Assertion
(C)Assertion is True, Reason is False
(D)Assertion is False, Reason is TrueCorrect

Answer: (D)

Solution

Van der Waals (London dispersion) forces actually correlate with polarisability, which generally rises as ionisation energy falls (a loosely-held outer electron cloud is more easily distorted) — so van der Waals forces are inversely,

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Question ID VK-146060