Page No 335: - Chapter 11 -Alcohols Phenols& Ethers - Intext Solutions - Ncert Solutions class 12 - Chemistry

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Question 11.6:

Give structures of the products you would expect when each of the following alcohol reacts with (a) HCl-ZnCl₂ (b) HBr and (c) SOCl₂.

(i) Butan-1-ol

(ii) 2-Methylbutan-2-ol

Answer:

(a)

(i)

Primary alcohols do not react appreciably with Lucas’ reagent (HCl-ZnCl₂) at room temperature.

(ii)

Tertiary alcohols react immediately with Lucas’ reagent.

(b)

(i)

(ii)

(c)

(i)

(ii)

Question 11.7:

Predict the major product of acid catalysed dehydration of

(i) 1-Methylcyclohexanol and

(ii) Butan-1-ol

Answer:

1.

(ii)

Question 11.8:

Ortho and para nitrophenols are more acidic than phenol. Draw the resonance structures of the corresponding phenoxide ions.

Answer:

Resonance structure of the phenoxide ion

Resonance structures of p-nitrophenoxide ion

Resonance structures of o-nitrophenoxide ion

It can be observed that the presence of nitro groups increases the stability of phenoxide ion.

Question 11.9:

Write the equations involved in the following reactions:

(i) Reimer-Tiemann reaction

(ii) Kolbe’s reaction

Answer:

1. Reimer–Tiemann reaction

2. Kolbe’s reaction