Chemistry Class 12 NCERT Solutions: Chapter 11 Alcohols Phenols and Ethers Part 12

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Q: 1. Classify the following as primary, secondary and tertiary alcohols:

(i)

(ii)

(iii)

(iv)

Q 1 iv The Pprimary, Secondary and Tertiary Alcohols

Q 1 Iv the Pprimary, Secondary and Tertiary Alcohols

Q 1 iv The Pprimary, Secondary and Tertiary Alcohols

(v)

Q 1 v The Pprimary, Secondary and Tertiary Alcohols

Q 1 v the Pprimary, Secondary and Tertiary Alcohols

Q 1 v The Pprimary, Secondary and Tertiary Alcohols

(vi)

Q 1 vi The Pprimary, Secondary and Tertiary Alcohols

Q 1 Vi the Pprimary, Secondary and Tertiary Alcohols

Q 1 vi The Pprimary, Secondary and Tertiary Alcohols

Answer:

Primary alcohol → (i), (ii), (iii)

Secondary alcohol → (iv), (v)

Tertiary alcohol → (vi)

Q: 2. Identify allylic alcohols in the above examples.

Answer:

The alcohols given in (ii) and (vi) are allylic alcohols.

Q: 3. Name the following compounds according to IUPAC system.

(i)

(ii)

(iii)

Q 3 iii The Compounds Aaccording to IUPAC System

Q 3 Iii the Compounds Aaccording to IUPAC System

Q 3 iii The Compounds Aaccording to IUPAC System

(iv)

(v)

Answer:

(i) 3-Chloromethyl-2-isopropylpentan-1-ol

(ii) 2, 5-Dimethylhexane-1, 3-diol

(iii) 3-Bromocyclohexanol

(iv) Hex-1-en-3-ol

(v) 2-Bromo-3-methylbut-2-en-1-ol

Q: 4. Show how are the following alcohols prepared by the reaction of a suitable Grignard reagent on methanal?

(i)

(ii)

Q 4 ii The Reaction of a Suitable Grignard Reagent on Methanal

Q 4 Ii Reaction of a Suitable Grignard Reagent on Methanal

Q 4 ii The Reaction of a Suitable Grignard Reagent on Methanal

Answer:

(i)

Q 4 i Ans The Reaction of a Suitable Grignard Reagent on Methanal

Q 4 I Ans Reaction of a Suitable Grignard Reagent on Methanal

Q 4 i Ans The Reaction of a Suitable Grignard Reagent on Methanal

(ii)

Q 4 ii Ans The Reaction of a Suitable Grignard Reagent on Methanal

Q 4 Ii Ans Reaction of a Suitable Grignard Reagent on Methanal

Q 4 ii Ans The Reaction of a Suitable Grignard Reagent on Methanal