JEE Main & Advanced Chemistry Alcohols, Phenols and Ethers / एल्कोहॉल, फीनॉल तथा ईथर Question Bank Properties of alcohol Phenol and Ethers

  • question_answer
    An organic compound X on treatment with acidified \[{{K}_{2}}C{{r}_{2}}{{O}_{7}}\] gives a compound Y which reacts with \[{{I}_{2}}\] and sodium carbonate to form tri-odomethane. The compound X is               [KCET 1996]

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

    B)                 \[C{{H}_{3}}-CO-C{{H}_{3}}\]

    C)                 \[C{{H}_{3}}CHO\]          

    D)                 \[C{{H}_{3}}CH(OH)C{{H}_{3}}\]

    Correct Answer: D

    Solution :

               \[\underset{{}}{\mathop{C{{H}_{3}}-\underset{OH}{\mathop{\underset{|}{\mathop{CH}}\,}}\,-C{{H}_{3}}}}\,\underset{{{H}_{2}}S{{O}_{4}}}{\mathop{\xrightarrow{{{K}_{2}}C{{r}_{2}}{{O}_{7}}}}}\,C{{H}_{3}}-\underset{O}{\mathop{\underset{||}{\mathop{C}}\,}}\,-C{{H}_{3}}\]                                                 \[\underset{{{I}_{2}}}{\mathop{\xrightarrow{NaOH}}}\,\underset{\text{Yellow}\,\,ppt}{\mathop{CH{{I}_{3}}}}\,+\,C{{H}_{3}}COONa\]


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