Question

Which of the following is the least stable and its existence is doubtful ?

• A. $Snl_4$
• B. $Cl_4$
• C. $Pbl_4$
• D. $Gel_4$

Answer 1

Answer: (C)

$Pbl_4$

Answer 2

Non-existence of $P b_{4}$ can be explained on the basis of strong oxidising nature of $Pb ^{4+}$. The $I ^{-}$ ions are reducing agents, i.e., in presence of this ion, $Pb ^{4+}$ ion is reduced to $Pb ^{2+}$ ion.

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