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JEE Main & Advanced Chemistry Biomolecules / जैव-अणु Question Bank Carbohydrates

  • question_answer
    A certain compound gives negative test with ninhydrin and positive test with Benedict's solution. The compound is [NCERT 1978; KCET 2000]

    A)                 A protein            

    B)                 A monosaccharide

    C)                 A lipid   

    D)                 An amino acid

    Correct Answer: B

    Solution :

               Protein gives blue-violet colour with ninhydrin (2, 2-dihydroxyindane-1, 3-diene) Carbohydrates gives brown red ppt. with benedict?s solution (Alk. \[CuS{{O}_{4}}+\]Citrate ions)


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