Short Answer TypeAccount for the following:
(i) CH3CHO is more reactive than CH3 COCH3 towards reaction with HCN.
(ii) The carboxylic acid is a stronger acid than phenol.
Write the chemical equations to illustrate the following name reactions:
(i) Wolff-Kishner reduction
(ii) Aldol condensation
(iii) Cannizzaro reaction
Long Answer TypeHow will you bring about the following conversions?
(i) Propanone to propane
(ii) Benzoyl chloride to benzaldehyde
(iii) Ethanal to but-2-enal
Short Answer TypeIllustrate the following name reaction giving suitable example in each case:
(i) Clemmensen reduction
(ii) Hell-Volhard-Zelinsky reaction
Give simple tests to distinguish between the following pairs of compounds.
(i) Pentan-2-one and Pentan-3-one
(ii) Benzaldehyde and Acetophenone
(iii) Phenol and Benzoic acid
Illustrate the following reactions giving a suitable example for each.
(i) Cross aldol condensation
(ii) Decarboxylation
Give simple tests to distinguish between the following pairs of compounds
(i) Pentan-2-one and Pentan-3-one
(ii) Benzaldehyde and Acetophenone
(iii) Phenol and Benzoic acid
Explain the following giving one example for each:
(i) Reimer-Tiemann reaction.
(ii) Friedel Craft’s acetylation of anisole.
i) Reimer-Tiemann Reaction: Reimer-Tiemann reaction involves the treatment of phenol with chloroform in the presence of aqueous sodium hydroxide at 340 K followed by hydrolysis of the resulting product to give 2-hydroxybenzaldehyde (salicylaldehyde). The chemical reaction can be represented as follows. 
ii) Friedel-Crafts acetylation of anisole: Friedel-Crafts acetylation of anisole involves the treatment of anisole with either acetyl chloride or acetic anhydride to give 2-methoxyacetophenone (as a minor product) and 4-methoxyacetophenone (as a major product).
The chemical reaction can be represented as follows. 
Long Answer TypeGive chemical tests to distinguish between
(i) Propanal and propanone,
(ii) Benzaldehyde and acetophenone.
(b) How would you obtain
(i) But-2-enal from ethanal,
(ii) Butanoic acid from butanol,
(iii) Benzoic acid from ethylbenzene?
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