Which of the given statements is incorrect?

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(C) Let us analyze each statement:$1$. Hydrated $CuSO_4$ (i.e.,$CuSO_4 \cdot 5H_2O$) contains ionic bonds between $Cu^{2+}$ and $SO_4^{2-}$,covalent b

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$K_4[Fe(CN)_6]$ shows only ionic and coordinate bonds.

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(C) Let us analyze each statement:$1$. Hydrated $CuSO_4$ (i.e.,$CuSO_4 \cdot 5H_2O$) contains ionic bonds between $Cu^{2+}$ and $SO_4^{2-}$,covalent bonds within the $SO_4^{2-}$ ion,coordinate bonds between $Cu^{2+}$ and $H_2O$ ligands,and hydrogen bonds between the water molecules and the sulfate ion. Thus,statement $A$ is correct.$2$. $NO_3^-$ contains covalent bonds between $N$ and $O$ atoms and a coordinate bond from $N$ to one of the $O$ atoms. Thus,statement $B$ is correct.$3$. $K_4[Fe(CN)_6]$ contains ionic bonds between $K^+$ and $[Fe(CN)_6]^{4-}$,coordinate bonds between $Fe^{2+}$ and $CN^-$ ligands,$AND$ covalent bonds within the $CN^-$ group $(C \equiv N)$. Statement $C$ claims it shows 'only' ionic and coordinate bonds,which is incorrect because it also contains covalent bonds.$4$. The carbonate ion $(CO_3^{2-})$ exhibits resonance. Thus,statement $D$ is correct.Therefore,the incorrect statement is $C$.

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