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

  • question_answer
    On heating glycerol with conc. \[{{H}_{2}}S{{O}_{4}},\] a compound is obtained which has a bad odour. The compound is [CPMT 1974; CBSE PMT 1994]

    A)                 Glycerol sulphate            

    B)                 Acrolein

    C)                 Formic acid        

    D)                 Allyl alcohol

    Correct Answer: B

    Solution :

                    \[\underset{C{{H}_{2}}-OH}{\overset{C{{H}_{2}}-OH}{\mathop{\underset{|\,\,\,\,}{\overset{|\,\,\,\,}{\mathop{CH}}}\,-OH\,\,\,\,}}}\,\underset{{{H}_{2}}S{{O}_{4}}}{\mathop{\xrightarrow{\text{conc}\text{.}}}}\,\underset{\text{Acrolein}}{\mathop{\underset{CHO}{\overset{C{{H}_{2}}\,}{\mathop{\underset{|\,\,\,\,\,\,\,}{\overset{||\,\,\,\,\,}{\mathop{CH\,}}}\,\,\,}}}\,}}\,+2{{H}_{2}}O\]


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