NEET-XII-Chemistry
Previous Year Paper year:2017
- #81Which of the following species is not stable?
(1) ``[SiF_6]^{2-}``
(2) ``[GeCl_6]^{2-}``
(3) ``[Sn(OH)_6]^{2-}``
(4) ``[SiCl_6]^{2-}``digAnsr: 4Ans : ( 4 )
Sol. • Due to presence of d-orbital in Si, Ge and
Sn they form species like SiF
6
2-, [GeCl
6
]2-,
[Sn(OH)
6
]2-
• SiCl
6
2- does not exist because six large
chloride ions cannot be accommodated
around Si4+ due to limitation of its size.