In which of the following molecules / ions $\mathrm{BF}_3$, $\mathrm{NO}_2^{-}, \mathrm{NH}_2^{-}$and…

In which of the following molecules / ions $\mathrm{BF}_3$, $\mathrm{NO}_2^{-}, \mathrm{NH}_2^{-}$and $\mathrm{H}_2 \mathrm{O}$, the central atom is $\mathrm{sp}^2$ hybridized?
  1. $\mathrm{BF}_3$ and $\mathrm{NO}_2^{-}$
  2. $\mathrm{NO}_2^{-}$and $\mathrm{NH}_2$
  3. $\mathrm{NH}_2^{-}$and $\mathrm{H}_2 \mathrm{O}$,
  4. $\mathrm{NO}_2^{-}$and $\mathrm{H}_2 \mathrm{O}$

Solution

Both $\mathrm{BF}_3$ and $\mathrm{NO}_2^{-}$is $\mathrm{sp}^2$ hybridized.

Asked in: NEET 2009 (Mains)

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