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Assertion (Statement-1): Pb(+4) compounds are stronger oxidising agents than Sn(+4) compounds. Reason (Statement-2): For group-14 elements the higher oxidation state becomes more stable for the heavier members because of the inert pair effect. Select the correct option.

1. Statement-1 is true, Statement-2 is true and Statement-2 is the correct explanation of Statement-1.
2. Statement-1 is true, Statement-2 is true but Statement-2 is NOT the correct explanation of Statement-1.
3. Statement-1 is true, Statement-2 is false.
4. Statement-1 is false, Statement-2 is true.

Correct answer: Statement-1 is true, Statement-2 is false.

Solution

Pb(+4) is indeed a stronger oxidiser than Sn(+4) because Pb(+2) is the stable state (Pb+4 tends to be reduced). Statement-2 is false because the inert pair effect makes the LOWER oxidation state, not the higher, more stable for heavier members.

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