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NEET Chemistry Aldehydes, Ketones Question Bank Self Evaluation Test - Aldehydes, Ketons and Carboxylic Acids

  • question_answer
    The correct product of the following sequence of reactions  \[{{(C{{H}_{3}})}_{2}}CHCOOH\text{ }\xrightarrow[(ii)\,{{H}_{2}}O]{(i)\,LiAl{{H}_{4}}}\,\,\,\xrightarrow{PB{{r}_{3}}}\] \[\xrightarrow[DMSO]{KCN}\,\,\,\,\xrightarrow[\Delta ]{{{H}_{2}}{{O}^{+}},\,{{H}^{+}}}\]

    A) \[{{\left( C{{H}_{3}} \right)}_{2}}CHCHBr.COOH\]

    B) \[{{(C{{H}_{3}})}_{2}}CHC{{H}_{2}}COOH\]

    C) \[{{\left( C{{H}_{3}} \right)}_{2}}CHC{{H}_{2}}C{{H}_{2}}N{{H}_{2}}\]

    D) \[{{\left( C{{H}_{3}} \right)}_{2}}C=CHCOOH\]

    Correct Answer: B

    Solution :

    [b] \[-COOH\xrightarrow[{{H}_{2}}O]{LiAl{{H}_{4}}}-C{{H}_{2}}OH\xrightarrow{PB{{r}_{3}}}\] \[-C{{H}_{2}}Br\xrightarrow[DMSO]{KCN}-C{{H}_{2}}CN\xrightarrow[{{H}_{2}}O]{{{H}^{+}}}-C{{H}_{2}}COOH\]


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