Question:

Which one of the following compounds is most acidic ?

Updated On: Oct 11, 2023

  • Cl—CH2—CH2—OH

  • OH-NO2 (Phenol)
  • -OH
  • OH-CH3
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The Correct Option is B

Solution and Explanation

When acidic H is eliminated, the stability of the anion directly relates to its acidic nature. Since the negative charge in phenol created once the acidic H is removed will be delocalized over the whole ring. That makes it the most stable. So, the most acidic chemical will be phenol.

Therefore, the correct option is (B):
 OH-NO2 (Phenol)

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Notes on Alcohols, Phenols And Ethers

Concepts Used:

Alcohols, Phenols, and Ethers - Chemical Reactions

The reaction of alcohols:

  1. Reaction with Metal
  2. Reaction with Halides
  3. Reaction with HNO3
  4. Reaction with Carboxylic Acid (Esterification)
  5. Dehydration of Alcohol
  6. Haloform Reaction

The reaction of phenols:

  1. Formation of Ester
  2. Hydrogenation
  3. Oxidation of Quinones
  4. Electrophilic Substitution
  5. Halogenation

The reaction of ethers:

  1. Contact with Air
  2. Halogenation of Ether
  3. Electrophilic Substitution Reaction

Read More: Alcohols, Phenols, and Ethers