The reagent that gives an orange colouration with acetaldehyde is:

N H_{2} O H

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N a H S O_{3}

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I_{2}

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2, 4 - D N P

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Solution

The correct option is D
$2, 4 - D N P$
2,4-dinitrophenylhydrazine gives orange colour with acetaldehyde.This is used for identification of aldehydes and ketones.
The reaction is as follows:

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