Which of the following species is not stable?
[GeCl6]2-
[Sn(OH)6]2-
[SiCl6]2-
[SiF6]2-
C.
[SiCl6]2-
(i) Due to presence of d-orbital in Si, Ge and Sn they form species like SiF62-, [GeCl6]2-, [Sn(OH)6]2-.
(ii) SiCl62- does not exist because six large chloride ions cannot be accommodated around Si4+ due to limitation of its size.
