Which of the following species contains three bond pairs and one lone pair around the central atom?

Which of the following species contains three bond pairs and one lone pair around the central atom?
  1. $\mathrm{H}_2 \mathrm{O}$
  2. $\mathrm{BF}_3$
  3. $\mathrm{NH}_2^{-}$
  4. $\mathrm{PCl}_3$

Solution

(A)
where,
bp = bond pairs,
and \(\mathrm{lp}=\) lone pairs. (b) (c) (d) Thus, in $\mathrm{PCl}_3$, the central atom $\mathrm{P}$ has three bond pairs and one lone pair.

Asked in: NEET 2012 (Screening)

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