BCECE Engineering BCECE Engineering Solved Paper-2001

  • question_answer
    The aldehyde can be detected by which of the following?

    A) Tollens reagent

    B) Fehlings solution

    C) Schiffs reagent

    D) All of the above

    Correct Answer: D

    Solution :

    Key Idea: The group to be detected by a reagent must give specific charge in colour or ppt. to show its presence. Aldehyde + Tollens reagent \[\to \]Silver mirror formed Aldehyde + Fehlings solution \[\to \]Red ppt. of \[C{{u}_{2}}O\]is formed Aldehyde + Schiffs reagent \[\to \]Pink colouration So, all the above reactions are used to detect presence of aldehyde group.


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