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

  • question_answer
    Read the following statements carefully :                 A secondary alcohol on oxidation gives a ketone                 Ethanol reacts with conc. \[{{H}_{2}}S{{O}_{4}}\] at \[{{180}^{o}}C\] to yield ethylene                 Methanol reacts with iodine and sodium hydroxide to give a yellow precipitate of iodoform                 Hydrogen gas is liberated when sodium is added to alcohol. Select the correct statements from the above set:

    A)                 A, B       

    B)                 C, D

    C)                 A, B, D  

    D)                 A, C, D

    Correct Answer: C

    Solution :

               A     \[C{{H}_{3}}-\underset{OH}{\mathop{\underset{|\,\,\,\,\,}{\mathop{CH}}\,}}\,-C{{H}_{3}}\xrightarrow{\text{Oxidation}}C{{H}_{3}}-\underset{O}{\mathop{\underset{||}{\mathop{C}}\,}}\,-C{{H}_{3}}\]            B     \[C{{H}_{3}}-C{{H}_{2}}-OH\underset{{{180}^{o}}C}{\mathop{\xrightarrow{\text{Conc}.\,{{H}_{2}}S{{O}_{4}}}}}\,C{{H}_{2}}=C{{H}_{2}}+{{H}_{2}}O\]            D     \[2C{{H}_{3}}C{{H}_{2}}OH+2Na\to 2C{{H}_{3}}-C{{H}_{2}}-ONa+{{H}_{2}}\]


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