MCQ
Which one of the following has largest ionic radius?
- ✓$O_2^{2 - }$
- B$Li^+$
- C$B^{3+}$
- D$F^-$
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($A$) tetranuclear $\left[\mathrm{B}_4 \mathrm{O}_5(\mathrm{OH})_4\right]^{2-}$ unit
($B$) all boron atoms in the same plane
($C$) equal number of $s p^2$ and $s p^3$ hybridized boron atoms
($D$) one terminal hydroxide per boron atom