Alcohols, Phenols and Ethers Class 12 Notes Chapter 11

Ethers are classified based on the group attached to an oxygen atom. Phenols and alcohols are categorized based on two factors:

  • Number of hydroxyl groups present
  • Based on the hybridization of the carbon atom to which the -OH group is attached

CBSE Class 12 Chemistry Chapter 11 Alcohols, Phenols and Ethers – Related Links

Alcohols can be prepared by the process of hydration of alkenes or from carbonyl compounds.

  • Hydration of alkenes – When preparing in this method it is either in the presence of an acid or by a hydroboration-oxidation reaction.
  • Carbonyl compounds – When preparing in this method it is carried out by catalytic reduction as well as the action of Grignard reagents.

Students can refer to the short notes and MCQ questions along with separate solution pdf of this chapter for quick revision from the links below:

Preparation Of Phenols

Alcohols can be prepared by substitution reaction or by hydrolyzing diazonium salts or from cumene

  • Substitution reaction – It can be prepared by two processes viz sulphonic acid group in aryl sulphonic acids, by –OH group and halogen atom in haloarenes.

Phenol Structure - C6H6O Class 12 Chapter 11

Ethers can be prepared by either dehydration of alcohols and Williamson synthesis. Hydrogen halides can cleave the C-O bond in ethers. Both alcohols, as well as phenols, are acidic in nature.

For More Information On Dehydration of Alcohols, Watch The Below Video:

Few Important Questions

  1. IUPAC names for compounds are given below. Write their structure
    • Cyclopent-3-en-1-ol
    • 2-Ethoxy-3-methylpentane
    • 2-Methylbutan-2-ol
    • 4-Chloro-3-ethylbutan-1-ol
  1. The boiling point of propanol is higher than hydrocarbon, butane. Explain.
  2. Show the synthesis of cyclohexylmethanol by using an alkyl halide in an SN2 reaction.
  3. Explain Kolbe’s reaction with an example.
  4. Which is more acidic between ortho nitrophenol and ortho methoxyphenol? Why?
  5. Ethanol has a higher boiling point when compared to methoxymethane? Explain.
  6. What will be the equation for the reactions given below?
    • Nitration of anisole
    • Friedel-Craft’s acetylation of anisole

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Frequently asked Questions on CBSE Class 12 Chemistry Notes Chapter 11: Alcohols, Phenols and Ethers

What are the uses of alcohols?

1. Alcoholic Drinks/drugs2. Industrial methylated spirits.3. Use of ethanol as a fuel. 4. Ethanol as a solvent. 5. Methanol as a fuel.

What are the properties of Haloalkanes?

1. Colourless/odourless 2. Hydrophobic 3. Reactive in nature 4. Undergo substitution, elimination and reduction reactions

What is a ‘Tertiary alcohol’?

A tertiary alcohol is a compound in which a hydroxy group, ‒ OH, is attached to a saturated carbon atom which has three other carbon atoms attached to it.

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