NEET Chemistry Alcohols, Phenols and Ethers / एल्कोहॉल, फीनॉल तथा ईथर Question Bank Self Evaluation Test - Alcohols, Phenols and Ethers

  • question_answer
    Which one of the following statements is not correct?

    A) Alcohols are weaker acids than water.

    B) Acid strength of alcohols decreases in the following \[RC{{H}_{2}}OH>{{R}_{2}}CHOH>{{R}_{3}}COH.\]

    C) Carbon-oxygen bond length in methanol, \[C{{H}_{3}}OH\] is shorter than that of \[C-O\] bond length in phenol.

    D) The bond angle  in methanol is\[108.9{}^\circ \].

    Correct Answer: C

    Solution :

    [c] The \[C-O\] bond length in alcohols is 142 pm and in Phenol it is 136 pm. The \[C-O\] bond length in phenol is .shorter than methanol it is due to the conjugation of unshared pair of electrons on oxygen with the ring, which imparts double bond character to the \[C-O\] bond.


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