Which of the following is least stable ?

MCQ

A
$CI_4$
B
$SnI_4$
C
$GeI_4$
✓
$PbI_4$

✓

Answer

Correct option: D.

$PbI_4$

d
As we go down the group the stability of halides will decrease due to increase in size of halogen atom, because of this reason the halogens easily disassociates from the compound,so lead iodide is least stable among the halides of $14^{th}$ group elements.

Non existance of $PbI _4$ can be explained on the basis of strong oxidising nature of $Pb_ 4^{+}$

$Pb ^{4+}+2 I ^{-} \rightarrow Pb ^{2+}+ I _2$

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