RAJASTHAN PMT Rajasthan - PMT Solved Paper-2004

  • question_answer
    \[C-O\] bond in ether can be broken by:

    A)  \[HI\]                                  

    B)  \[HCl\]

    C)  \[HBr\]               

    D)         \[HF\]

    Correct Answer: A

    Solution :

    In  the reaction,       \[ROR+HX\xrightarrow{{}}ROH+RX\] the correct order of reactivity of halogen acids is:                 \[HI>HBr>HCl\] The smaller alkyl group always forms alkyl halide while bigger alkyl group (or aryl group) forms alcohol (or phenol).                 \[C{{H}_{3}}OCH{{(C{{H}_{3}})}_{2}}+HI\xrightarrow{{}}C{{H}_{3}}I\]                                                                 \[+{{(C{{H}_{3}})}_{2}}CHOH\] \[C{{H}_{3}}O{{C}_{6}}{{H}_{5}}+HI\xrightarrow{{}}C{{H}_{3}}I+\underset{Phenol}{\mathop{{{C}_{6}}{{H}_{5}}OH}}\,\]


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