Which of the following halides is least stabl | vedclass

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(D) $PbI_4$ is the least stable halide among the given options due to the following reasons:$(I)$ The size of the iodine atom is very large,which make

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$PbI_4$

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(D) $PbI_4$ is the least stable halide among the given options due to the following reasons:$(I)$ The size of the iodine atom is very large,which makes the $Pb-I$ bond weak.$(II)$ Due to the inert pair effect,the $+2$ oxidation state of $Pb$ is significantly more stable than the $+4$ oxidation state. Consequently,$PbI_4$ tends to decompose into $PbI_2$ and $I_2$.

Which of the following halides is least stable and has doubtful existence?

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