JEE Advanced · 2008 · 13 Apr 2008 · Paper 1 · p-Block Elements

STATEMENT-1 :

Pb^{4 +}

compounds are stronger oxidizing agents than

Sn^{4 +}

compounds.
and
STATEMENT-2 : The higher oxidation states for the group 14 elements are more stable for the heavier members of the group due to 'inert pair effect'.

(A)STATEMENT-1 is True, STATEMENT-2 is True; STATEMENT-2 is a correct explanation for STATEMENT-1
(B)STATEMENT-1 is True, STATEMENT-2 is True; STATEMENT-2 is NOT a correct explanation for STATEMENT-1
(C)STATEMENT-1 is True, STATEMENT-2 is False✓ Correct
(D)STATEMENT-1 is False, STATEMENT-2 is True

Answer: (C)

Solution

STATEMENT-1 is True:

Pb^{4 +}

compounds are stronger oxidizing agents than

Sn^{4 +}

because

Pb^{4 +}

readily accepts electrons to form the more stable

Pb^{2 +}

state.

STATEMENT-2 is False: Due to the inert pair effect, the lower oxidation states (+2) become more stable for heavier group 14 elements, not the higher oxidation states (+4). The inert pair effect refers to the reluctance of the s-electrons to participate in bonding.

Therefore, Statement-1 is true but Statement-2 is false.

JEE Advanced · 2008 · 13 Apr 2008 · Paper 1 · Single correct option

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JEE Advanced · 2008 · 13 Apr 2008 · Paper 1 · p-Block Elements

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