JEE Main & Advanced Chemistry Alcohols, Phenols and Ethers / एल्कोहॉल, फीनॉल तथा ईथर Question Bank Critical Thinking Alcohols,Phenols

  • question_answer
    The correct order of boiling point for primary \[({{1}^{o}}),\] secondary \[({{2}^{o}})\] and tertiary \[({{3}^{o}})\] alcohols is [CPMT 1999; RPMT 2002]

    A)                 \[{{1}^{o}}>{{2}^{o}}>{{3}^{o}}\]             

    B)                 \[{{3}^{o}}>{{2}^{o}}>{{1}^{o}}\]

    C)                 \[{{2}^{o}}>{{1}^{o}}>{{3}^{o}}\]             

    D)                 \[{{2}^{o}}>{{3}^{o}}>{{1}^{o}}\]

    Correct Answer: A

    Solution :

               \[{{1}^{o}}\]alcohol \[>{{2}^{o}}\]alcohol \[>{{3}^{o}}\]alcohol                 Boiling point of alcohols decreases as the number of branches increases.


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