NEET AIPMT SOLVED PAPER 2002

  • question_answer
                    n-propyl alcohol and isopropyl alcohol can be chemically distinguished by which reagent:             

    A)                                                                                                                                                                                            \[PC{{l}_{5}}\]

    B)                 reduction

    C)                 oxidation with potassium dichromate

    D)                 ozonolysis

    Correct Answer: C

    Solution :

                    n-propyl alcohol and isopropyl alcohol gives different product on oxidation with \[{{K}_{2}}C{{r}_{7}}\].                 \[\underset{\begin{smallmatrix}  \text{n-Propyl} \\  \text{  alcohol} \end{smallmatrix}}{\mathop{C{{H}_{3}}-C{{H}_{2}}}}\,-C{{H}_{2}}OH\xrightarrow[{{K}_{2}}C{{r}_{2}}{{O}_{7}}/{{H}_{2}}S{{O}_{4}}]{[O]}\]                                 \[\underset{\text{Prophionaldehyde}}{\mathop{C{{H}_{3}}-C{{H}_{2}}-CHO}}\,\]                                                 \[C{{H}_{3}}-\underset{\begin{smallmatrix}  | \\  O  \\  \text{Acetone} \end{smallmatrix}}{\mathop{C}}\,-C{{H}_{3}}\]


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