Which of the following is the weakest base?

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(D) The strength of a base is inversely proportional to the strength of its conjugate acid.$1$. The conjugate acids of the given bases are: $CH_3COOH$

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$Cl^-$

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(D) The strength of a base is inversely proportional to the strength of its conjugate acid.$1$. The conjugate acids of the given bases are: $CH_3COOH$ (for $CH_3COO^-$),$CH_4$ (for $CH_3^-$),$CH_3OH$ (for $CH_3O^-$),and $HCl$ (for $Cl^-$).$2$. The acid strength order is: $HCl > CH_3COOH > CH_3OH > CH_4$.$3$. Since $HCl$ is the strongest acid,its conjugate base $Cl^-$ is the weakest base.

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