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How Will You Convert Benzoic Acid to M-bromobenzoic Acid?

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How will you convert benzoic acid to m-bromobenzoic acid?

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2018-2019 (March) Set 1

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CH3CHO, \[\begin{array}{cc}
\ce{(CH3)3C-C-CH3}\\
\phantom{....}||\\
\phantom{....}\ce{O}
\end{array}\],  \[\begin{array}{cc}
\ce{CH3-C-CH3}\\
||\\
\ce{O}
\end{array}\]

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