Class 12 Chemistry Important Chapter 11 Alcohols, Phenols, and Ethers

Class 12 Chemistry Important Chapter 11 Alcohols, Phenols, and Ethers Solutions English Medium As Per The New Syllabus to each chapter is provided in the list so that you can easily browse through different chapters ASSEB Class 12 Chemistry Important Solutions in English and select need one. AHSEC Class 12 Chemistry Additional Notes Download PDF. HS 2nd Year Chemistry Additional Solutions.

Class 12 Chemistry Important Chapter 11 Alcohols, Phenols, and Ethers

Also, you can read the NCERT book online in these sections Solutions by Expert Teachers as per Central Board of Secondary Education (CBSE) Book guidelines. ASSEB Class 12 Chemistry Additional Question Answer are part of All Subject Solutions. Here we have given HS 2nd Year Chemistry Important Solutions English Medium for All Chapters, You can practice these here.

Alcohols, Phenols, and Ethers

Chapter: 11

PART – II

IMPORTANT QUESTION AND ANSWER

1. What functional group is present in alcohols?

Ans: Hydroxyl group (–OH) attached to an aliphatic carbon.

2. How are primary, secondary, and tertiary alcohols classified?

Ans: Based on whether the –OH is attached to a primary, secondary, or tertiary carbon.

3. What is the main difference between alcohols and phenols?

Ans: In alcohols, –OH is attached to an aliphatic carbon; in phenols, –OH is attached to an aromatic ring.

4. What is Williamson synthesis used for?

Ans: Preparation of ethers by reaction of alkyl halides with sodium alkoxides.

5. Why do alcohols have higher boiling points than ethers?

Ans: Because alcohols can form intermolecular hydrogen bonds, ethers cannot.

6. Which is more acidic, phenol or ethanol? Why?

Ans: Phenol, because the phenoxide ion is resonance stabilized.

7. Name the industrial process to prepare phenol from cumene.

Ans: Cumene process (oxidation of cumene to cumene hydroperoxide).

8. What happens when alcohols react with hydrogen halides?

Ans: They form alkyl halides and water.

9. What type of reaction is the dehydration of alcohols?

Ans: Elimination reaction to form alkenes.

10. What reagent is used to oxidize primary alcohols to aldehydes?

Ans: Pyridinium chlorochromate (PCC).

11. What products are formed on oxidation of secondary alcohols?

Ans: Ketones.

12. Can tertiary alcohols be easily oxidized?

Ans: No, tertiary alcohols resist oxidation.

13. What is the role of sodium hydroxide in the preparation of phenols from haloarenes?

Ans: It replaces the halogen atom with an –OH group under high temperature and pressure.

14. What type of reaction do phenols undergo on the aromatic ring?

Ans: Electrophilic aromatic substitution.

15. Why are ethers considered less reactive than alcohols and phenols?

Ans: Because ethers lack acidic hydrogen and have no significant polarity leading to lower reactivity.