NIOS Class 12 Chemistry Chapter 26 Alcohols, Phenols and Ethers

NIOS Class 12 Chemistry Chapter 26 Alcohols, Phenols and Ethers Solutions English Medium As Per New Syllabus to each chapter is provided in the list so that you can easily browse throughout different chapters NIOS Class 12 Chemistry Chapter 26 Alcohols, Phenols and Ethers Notes in English and select need one. NIOS Class 12 Chemistry Solutions English Medium Download PDF. NIOS Study Material of Class 12 Chemistry Notes Paper Code: 313.

NIOS Class 12 Chemistry Chapter 26 Alcohols, Phenols and Ethers

Also, you can read the NIOS book online in these sections Solutions by Expert Teachers as per National Institute of Open Schooling (NIOS) Book guidelines. These solutions are part of NIOS All Subject Solutions. Here we have given NIOS Class 12 Chemistry Notes, NIOS Senior Secondary Course Chemistry Solutions in English for All Chapter, You can practice these here.

Alcohols, Phenols and Ethers

Chapter: 26

INTEXT QUESTIONS 26.1

1. Give the IUPAC names of the following alcohols:

(i) 

Ans: 2-Methylpentan-2-ol.

(ii) 

Ans: 2-Ethylbut-2-en-1-ol.

(iii) 

Ans: 1, 4-Pentanediol.

2. How will you prepare propan-1-ol from propanal?

Ans: By reduction with NaBH4 or LiAlH4.

3. Give the synthesis of 2-methylpropan-2-ol using Grignard reagent.

Ans: 

4. Give the product of the following reactions:

(i) 

Ans: Hexanoic Acid.

(ii) 

Ans: Hexanal.

5. What is MTBE? GIve its use.

Ans: MTBE is methyl tert-butyl ether. It is used as an additive to gasoline.

6. What is the product obtained when alcohols are dehydrated?

Ans: Alkenes.

INTEXT QUESTIONS 26.2

1. How will you convert aniline to phenol?

Ans: 

2. What is the starting material in Dow’s process?

Ans: Chlorobenzene .

3. Arrange the following in the increasing order of their acidity: Phenol, 2-Methylphenol, 2-Chlorophenol.

Ans: 2-Methylphenol < Phenol < 2-Chlorophenol.

4. How will you prepare salicylic acid from phenol?

Ans: By Kolbe reaction.

5. What is an azo dye?

Ans: Azo dyes are azo compounds formed by the reaction of phenols with aromatic diazonium salts. They are brightly coloured.

INTEXT QUESTIONS 26.3

1. What are the IUPAC names of the following ethers?

(i) 

Ans: 2-Methoxybutane.

(ii) CH₃–O–CH₃

Ans: Methoxymethane.

2. (i) How will you prepare methyl propyl ether using Williamson synthesis?

Ans: CH₃CH₂CH₂O⁻ + CH₃Br ⎯⎯→ CH3CH2 – O – CH3 + Br⁻.

(ii) What is the IUPAC name of methyl propyl ether?

Ans: Methoxypropane.

3. Why should you be careful in using old stock of ethers.

Ans: They may explode due to the presence of peroxides.

4. Why are ethers good solvents?

Ans: Because they are unreactive in nature.

5. What is tetrahydrofuran? Give its structure and use?

Ans: It is a cyclic ether.

It is used as a solvent.

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