KVPY Sample Paper KVPY Stream-SX Model Paper-17

  • question_answer
    Two hexoses form the same osazone find the correct statement about these hexoses.

    A) Both of them must be aldoses

    B) They are epimers at C-3

    C) The carbon atoms 1 and 2 in both have the same configuration

    D) The carbon atoms 3, 4 and 5 in both have the same configuration

    Correct Answer: D

    Solution :

    In the formation of osazone \[C-1\] and \[C-2\] react with phenyl hydrazine to form phenyl hydrazone. If \[C-3,\]\[C-4,\]\[C-5\] have same configuration the carbohydrates will form same osazone even if they differ in configuration at \[C-1\] or \[C-2.\]


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