How many moles of $(C)$ react with $1 m o l P h N H N H_{2}$

1

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3

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2

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1 / 3

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Solution

The correct option is D $1 / 3$
Compound $(A)$ has no $(C - O H)$ group $α$ to the $(C H = O)$ group. So it forms only phenylhydrazone with $1 m o l$ of $P h N H N H_{2}$ .
Compound $(B)$ has $(C - O H)$ group $α$ to the $(C H = O)$ group. So it forms only osazone by reacting with $3 m o l P h N H N H_{2}$
$∴ 3 m o l P h N H N H_{2}$ reacts with $1 m o l (C)$ .
$1 m o l P h N H N H_{2}$ reacts with $\frac{1}{3} m o l (C)$ .

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