Which proton is expected to be the most acidic in the molecule shown below?

Name: Which proton is expected to be the most acidic in the molecule shown below?
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Question

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The proton on the carbon attached to the nitro group (proton c) is expected to be the most acidic because the nitro group is a strong electron-withdrawing group that destabilizes the negative charge that will form on the carbon when the proton is removed.

Which Proton Is Expected to Be the Most Acidic in the Molecule