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J & K CET Engineering J and K - CET Engineering Solved Paper-2008

  • question_answer
    The \[\alpha -\]amino acid which does not give purple colour in the ninhydrin test is

    A)  proline         

    B)  glycine

    C)  lysine          

    D)  aspartic acid

    Correct Answer: A

    Solution :

     Ninhydrin test is highly specific for primary amines. Proline being a secondary amine give a yellow orange colour with ninhydrin whereas all other \[\alpha -\]amino acids give a blue-purple colour with ninhydrin.


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