Which of the following chemical species contain at least one coordinate (dative) covalent bond? — Chemical Bonding Chemistry Question

💡 Solution & Explanation

$NH_4Cl$ contains ionic, covalent, and a dative bond (from $N$ to $H^+$). $O_3$ has one double bond and one coordinate bond from the central oxygen to a terminal oxygen. Coordination complexes like $[Cu(NH_3)_4]^{2+}$ are formed purely via coordinate bonds from the ligands to the transition metal. $K_2CO_3$ lacks a coordinate bond in its standard structure.