Single Choice

How many moles of $$(C)$$ react with $$1\ mol\ PhNHNH_2$$

A$$1$$
B$$3$$
C$$2$$
D$$1/3$$
Correct Answer

Solution

Compound $$(A)$$ has no $$(C-OH)$$ group $$\alpha$$ to the $$(CH=O)$$ group. So it forms only phenylhydrazone with $$1\ mol$$ of $$PhNHNH_2$$.
Compound $$(B)$$ has $$(C-OH)$$ group $$\alpha$$ to the $$(CH=O)$$ group. So it forms only osazone by reacting with $$3\ mol\ PhNHNH_2$$
$$\therefore 3\ mol\ PhNHNH_2$$ reacts with $$1\ mol\ (C)$$.
$$1\ mol\ PhNHNH_2$$ reacts with $$\dfrac{1}{3}\ mol\ (C)$$.

SIMILAR QUESTIONS

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