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AMU Medical AMU Solved Paper-2007

  • question_answer
    When acetaldehyde is heated with Fehling solution, it gives a red precipitate of

    A)  Cu                                         

    B)  CuO

    C)  \[C{{u}_{2}}O\]                               

    D)  \[Cu{{(OH)}_{2}}\]

    Correct Answer: C

    Solution :

                     Acetaldehyde reacts with Fehling solution to give red ppt. of cupric oxide. \[C{{H}_{3}}CHO+\underbrace{2C{{u}^{2+}}+5O{{H}^{-}}}_{Fehling\text{ }solution}\xrightarrow{{}}\]                                 \[C{{H}_{3}}\underset{red\text{ }ppt.}{\mathop{CO{{O}^{-}}+C{{u}_{2}}O+3{{H}_{2}}O}}\,\]


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