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JEE Main202126 Feb 2021Evening ShiftChemistryAldehydes and KetonesActual

2 , 4 - DNP test can be used to identify :

Options

  1. Aaldehyde
  2. Bamine
  3. Chalogens
  4. Dether

Correct answer

A. aldehyde

Step-by-step solution

2 ,   4 - DNP test is useful for the identification of carbonyl compounds. The 2,4-dinitrophenylhydrazine can be used as a process for the identification of aldehydes and ketones. The formed 2,4-dinitrophenylhydrazone is a solid that is purified and the melting point is determined. The comparison of a melting point with a table of known values could identify the compound as aldehyde or ketone

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