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Amino Acids

pKa value of ...

Question

$p K a$ value of the compound decreases if X is :

N O_{2}

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- N H_{2}

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- O H

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- O C H_{3}

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Solution

The correct option is C $N O_{2}$
$N O_{2}$ is an electron withdrawing group or has negative inductive effect $- I$ , therefore compound having $N O_{2}$ would be most acidic among the given functional groups.

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