MCQ
Which of the following doesn't exist
- ✓$BF_6^{3-}$
- B$AlF_6^{3-}$
- C$SiF_6^{2-}$
- D$GeCl_6^{2-}$
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$\sigma \,\,1{s^2}\,\,{\sigma ^*}\,\,1{s^2}\,\sigma \,\,2{s^2}\,{\sigma ^*}\,2{s^2}\,\,\sigma \,2p_x^2\,\left\{ {{}_{\pi \,2p_z^2}^{\pi \,2p_y^2}} \right.$
Its bond order is

