The sole scenario is the sigma overlap. As a result, we can see that the HCl MO contains one pair of bonding electrons in the 3pz orbital and six pairs of nonbonding electrons. The correct option is (C).
9 nonbonding electron pairs are in a hydrogen chloride molecule.
Each chlorine has three non-bonding pairs. Neither does hydrogen. There are 9 non-bonding pairs in this molecule because it contains 3 chlorine atoms.
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