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

  • question_answer
    Which of the following will not form a yellow precipitate on heating with an alkaline solution of iodine [CBSE PMT 2004]

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

    B)                 \[C{{H}_{3}}C{{H}_{2}}OH\]

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

    D)                 \[C{{H}_{3}}C{{H}_{2}}CH(OH)C{{H}_{3}}\]

    Correct Answer: A

    Solution :

                    Formation of a yellow precipitate on heating a compound with an alkaline solution of iodine is known as iodoform reaction. Methyl alcohol does not respond to this test. Iodoform test is exhibited by ethyl alcohol, acetaldehyde, acetone, methyl ketone and those alcohols which possess \[C{{H}_{3}}CH(OH)-\]group.


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