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JEE Main2014ChemistryAlcohols Phenols and EthersActual

Which one of the following statements is not correct?

Options

  1. AAlcohols are weaker acids than water
  2. BAcid strength of alcohols decreases in the following RCH ₂ OH > R ₂ CHOH > R ₃ COH
  3. CCarbon-oxygen bond length in methanol, CH ₃ OH is shorter than that of C - O bond length in phenol.

Correct answer

C. Carbon-oxygen bond length in methanol, CH ₃ OH is shorter than that of C - O bond length in phenol.

Step-by-step solution

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 that in methanol 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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