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KVPY Sample Paper KVPY Stream-SX Model Paper-12

  • question_answer
    A compound with molecular formula \[{{C}_{4}}{{H}_{10}}{{O}_{3}}\] is converted by the action of acetyl chloride to a compound of molecular  mass  190  the  original compound \[({{C}_{4}}{{H}_{10}}{{O}_{3}})\] has -

    A) Two \[-\] OH groups

    B) Four \[-\] OH groups

    C) One OH group

    D) Three \[-\] OH groups

    Correct Answer: A

    Solution :

    In acetylation reaction one acidic H is replace by \[-\underset{\underset{O}{\mathop{\parallel }}\,}{\mathop{C}}\,-C{{H}_{3}}\] group and molecular mass increased by - 42 with each H replacement. Total mass increase is 84 So \[2-OH\]group.


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