RAJASTHAN ­ PET Rajasthan PET Solved Paper-2009

  • question_answer
    The blue colour of acidic solution of\[C{{r}_{2}}O_{7}^{2-}\]is not changed into green by

    A)  \[{{C}_{6}}{{H}_{5}}C{{H}_{2}}OH\]

    B)  \[{{(C{{H}_{3}})}_{2}}CHOH\]

    C)  \[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}C{{H}_{2}}OH\]

    D)  \[{{(C{{H}_{3}})}_{3}}COH\]

    Correct Answer: D

    Solution :

     Tertiary alcohol is not oxidised by acidic solution of\[C{{r}_{2}}O_{7}^{2-}\]hence, the colour of\[C{{r}_{2}}O_{7}^{2-}\]solution remains unchanged. \[{{(C{{H}_{3}})}_{3}}C-OH\]is a tertiary alcohol, hence it cannot change the blue colour of\[C{{r}_{2}}O_{7}^{2-}\]solution into green.


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