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Question

(A) The inert pair effect is the tendency of the two electrons in the outermost $s$-orbital to remain unshared in compounds due to the poor shielding

Vedclass · Accepted Answer

$B < Al < Ga < In < Tl$

Vedclass · Answer

(A) The inert pair effect is the tendency of the two electrons in the outermost $s$-orbital to remain unshared in compounds due to the poor shielding effect of intervening $d$ and $f$ orbitals.As we move down the group from $B$ to $Tl$,the inert pair effect increases.Therefore,the stability of the $+1$ oxidation state increases down the group,while the stability of the $+3$ oxidation state decreases.The correct order of the inert pair effect for Group $13$ elements is $B < Al < Ga < In < Tl$.

Which of the following represents the correct order of the inert pair effect in Group $13$ elements?

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