Which of the following has a coordinate bond?

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Question

(A) In the sulfite ion $(SO_3^{2-})$,the sulfur atom is bonded to three oxygen atoms.To satisfy the octet rule for all atoms,one of the $S-O$ bonds is

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$SO_3^{2-}$

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(A) In the sulfite ion $(SO_3^{2-})$,the sulfur atom is bonded to three oxygen atoms.To satisfy the octet rule for all atoms,one of the $S-O$ bonds is represented as a coordinate covalent bond (dative bond) where the sulfur atom donates a lone pair of electrons to an oxygen atom.In contrast,$CH_4$,$CO_2$,and $NH_3$ primarily involve covalent bonds formed by electron sharing without coordinate bonds in their standard Lewis structures.

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