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The sum of total number of moles of PhNHNH ₂ used with A & ~B ..........

Correct answer

4

Step-by-step solution

(A) has no C - OH group, to the CH = O group. So it forms only phenylhydrazone with 1 mole of PhNHNH ₂ . (B) has ( C - OH ) group to the CH = O group, so it forms only ozazone by reaction with 3 mole of PhNHNH ₂ .

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