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Incorrect statement is :...

Incorrect statement is :

A

`AlF_(3) gt MgO gt MgF_(2)` : Lattice energy

B

`Li gt Na gt Al gt Mg` : Electron afinity

C

`SF_(6) gt PF_(5) gt SiF_(4)` : Lewis acidic character

D

`SiCl_(4) gt SiBr_(4) gt SiI_(4)` : Decreasing order of electronegativity of Si

Text Solution

Verified by Experts

The correct Answer is:
C
Correct order of Lewis acidic character : `PF_(5) gt SiF_(4) gt SF_(6)`. Although, S has vaccant 3d- orbitals but it cannot accept co- ordinate bond from Lewis base due to steric crowding factor as S-atom is already bonded to six F- atoms.
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