Uttarakhand PMT Uttarakhand PMT Solved Paper-2008

  • question_answer
    An alkene on vigorous oxidation with\[KMn{{O}_{4}}\]gives only acetic acid. The alkene is

    A)  \[C{{H}_{3}}C{{H}_{2}}CH=C{{H}_{2}}\]

    B)  \[C{{H}_{3}}CH=CHC{{H}_{3}}\]

    C)  \[{{(C{{H}_{3}})}_{2}}C=C{{H}_{2}}\]

    D)  \[C{{H}_{3}}CH=C{{H}_{2}}\]

    Correct Answer: B

    Solution :

     Since the alkene on oxidation gives only acetic acid,  therefore,  the  alkene  must be symmetrical containing two carbon-atoms on either side of the double bond, ie, 2-butene \[C{{H}_{3}}CH=CHC{{H}_{3}}\xrightarrow[{}]{KMn{{O}_{4}}}2C{{H}_{3}}COOH\]


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