`[SiF_(6)]^(2-)` is known whereas `[SiC_(6)]^(2-)` not. The main reason is/are
I Six large chloride ions cannot be accommodated around `Si^(4+)` due to limitation of its size.
II. Interaction between lone pair of chloride ion and `Si^(4+)` is not very strong.
Choose the correct option.

Options

A. Only I
B. Only II
C. Both I and II
D. Neither I nor II

Answer

C

Explanation

` [SiF_6]^ 2 - ` is known whereas ` [SiCl_6]^ ( 2 - ) ` is not.
The main reason are
(i) six large chloride ions cannot be accomodated around ` Si^( 4 + ) ` due to limitation of its size.
(ii) interaction between lone pair of chloride ion and ` Si^( 4 + ) ` is not very strong.