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Dehydrohalogenation of Dihalides

Aldehydes on ...

Question

Aldehydes on reaction with $N H_{2} - N H_{2}$ forms:

aniline

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hydrazone

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nitrobenzene

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none of the above

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Solution

The correct option is B hydrazone
Reaction between hydrazine with aldehyde forms hydrazone. It is a condensation reaction. The reaction is shown below:
$R - C H O + N H_{2} - N H_{2} ⇌ R - C H = N - N H_{2} Aldehyde Hydrazine Hydrazone$
Hence, Option (b) is the correct aswer.

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