Chemistry Class 12 NCERT Solutions: Chapter 11 Alcohols Phenols and Ethers Part 12 (For CBSE, ICSE, IAS, NET, NRA 2023)

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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

(v)

Q_1_v_The Pprimary, Secondary and Tertiary Alcohols

(vi)

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

(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 Methan …

Answer:

(i)

Q_4_i_Ans_The Reaction of a Suitable Grignard Reagent on Met …

(ii)

Q_4_ii_Ans_The Reaction of a Suitable Grignard Reagent on Me …