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12th Class Chemistry Alcohols, Phenols and Ethers / एल्कोहॉल, फीनॉल तथा ईथर Question Bank MCQs - Alcohols, Phenols and Ethers

  • question_answer
    \[A\xleftarrow[\Delta ]{Cu}C{{H}_{3}}C{{H}_{2}}OH\xrightarrow[\Delta ]{A{{l}_{2}}{{O}_{2}}}B\]
    A and B respectively are

    A) alkene, alkyne

    B) alkanal, alkene

    C) alkyne, alkanal

    D) alkene, alkanal

    Correct Answer: B

    Solution :

    [b]
    Ethanol on reduction with Cu gives ethanal which an reaction with \[A{{l}_{2}}{{O}_{3}}\] it reduces to ethene.
    \[\underset{Ethanal}{\mathop{C{{H}_{3}}CHO}}\,\xleftarrow[\Delta ]{Cu}C{{H}_{3}}C{{H}_{2}}OH\xrightarrow[\Delta ]{A{{l}_{2}}{{O}_{3}}}\underset{Ethene}{\mathop{C{{H}_{2}}=C{{H}_{2}}}}\,\]


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