Which one of the following elements of unable to form ${\rm{MF}}_{\rm{6}}^{{\rm{3 - }}}$ ion ?

NEET UG CHEMISTRY MCQ: 13 TH GROUP ELEMENTS (P-BLOCK)

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Which one of the following elements of unable to form

\mathrm{MF}_\mathrm{6}^{\mathrm{3 - }}

ion ?

View answer and explanation

Correct option: C

\mathrm{B}

Option C (B) is correct because Boron does not have d-orbitals to expand its coordination number to 6, and thus cannot form

\mathrm{MF}_\mathrm{6}^{\mathrm{3 - }}

ion.

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{H}_3 {PO}_4

{H}_3 {BO}_3

{P}\, \& {~B}

N{H_3}

B{F_3}

\mathrm{TI}

\mathrm{d}

\mathrm{f}