JEE Main Chemistry question

Which does not show the inert pair effect?

(A)AlCorrect
(B)Sn
(C)Pb
(D)Thallium

Answer: (A)

Solution

The inert pair effect (reluctance of the outermost electron pair to participate in bonding) becomes significant only for heavier -block elements, from period 4 onward, where poor shielding

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Question ID VK-133719