Which of the following is the most basic?

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(A) The basicity of an anion is inversely proportional to the stability of its conjugate acid. The conjugate acids of the given anions are $HF$,$HCl$,

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$F^-$

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(A) The basicity of an anion is inversely proportional to the stability of its conjugate acid. The conjugate acids of the given anions are $HF$,$HCl$,$HBr$,and $HI$. Among these,$HI$ is the strongest acid because the $H-I$ bond is the weakest due to the large size of the $I^-$ ion. Conversely,$HF$ is the weakest acid among the hydrohalic acids. Since the strength of the conjugate acid is inversely related to the basicity of the conjugate base,the weakest acid $(HF)$ will have the strongest conjugate base $(F^-)$. Therefore,$F^-$ is the most basic among the given options.

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