Statement-1: The ionisation potential of Sn i: greater than Pb.
Statement-2: Usually, ionisation energy decreases down the group.

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Statement-1 is False, Statement-2 is True.

Statement-1 is True, Statement-2 is True, Statement is NOT a correct explanation for Statement-1.

Statement-1 is True, Statement-2 is False

Statement-1 is True, Statement-2 is True; Statement is a correct explanation for Statement-1.

answer is D.

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Detailed Solution

As we advance down the group, the atomic size grows and the ionisation energy drops, increasing the distance between the electrons and the nucleus. Lead has a minor advantage over tin in terms of first ionisation energy.

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