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BHU PMT BHU PMT (Screening) Solved Paper-2010

  • question_answer
    An organic compound with the formula\[{{C}_{6}}{{H}_{12}}{{O}_{6}}\]forms a yellow crystalline solid with phenylhydrazine and gives a mixture of sorbitol and mannitol when reduced with sodium. Which among the following could be the compound?

    A)  Fructose

    B)  Glucose

    C)  Mannose

    D)  Sucrose

    Correct Answer: A

    Solution :

                     Since,\[{{C}_{6}}{{H}_{12}}{{O}_{6}}\]a crystalline osazone with phenylhydrazine, it must be an aldohexose or ketohexose. Moreover, on reduction with Na, it gives sorbitol and mannitol, it must be fructose.


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