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  4. Which of the following compounds containing carbonyl group will give coloured crystalline compound with

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Q. Which of the following compounds containing carbonyl group will give coloured crystalline compound with
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Aldehydes Ketones and Carboxylic Acids

Solution:

Only aldehydes and ketones react with $2,4-$dinitrophenylhydrazine (DNP) to produce characteristic red or orange colour solution.