In which of the following does the inert pair | vedclass

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(D) The inert pair effect is the tendency of the two electrons in the outermost $s$-orbital to remain unshared in compounds of post-transition metals.

Vedclass · Accepted Answer

$Tl$

Vedclass · Answer

(D) The inert pair effect is the tendency of the two electrons in the outermost $s$-orbital to remain unshared in compounds of post-transition metals. This effect becomes more prominent as we move down a group in the $p$-block elements. Among the given options,$Tl$ (Thallium) is a member of Group $13$ and is located at the bottom of the group. Therefore,$Tl$ exhibits the inert pair effect significantly,where the $+1$ oxidation state becomes more stable than the $+3$ oxidation state.

In which of the following does the inert pair effect play an important role?

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