Aldehydes or ketones when treated with $C_{6} H_{5} - N H - N H_{2}$ , the product formed is:

semicarbazone

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phenylhydrazone

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hydrazone

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oxime

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Solution

The correct option is B phenylhydrazone
Aldehydes or ketones when treated with phenyl hydrazine, $C_{6} H_{5} - N H - N H_{2}$ , the product is phenylhydrazone.
For example, acetaldehyde gives the following reaction.
$C_{6} H_{5} - N H - N H_{2} + C H_{3} C H O \to C_{6} H_{5} - N H - N = C H - C H_{3}$

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N H_{2} - N H_{2}

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