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Describe the following giving the relevant chemical equation in each case:
(i) Carbylamine reaction
(ii) Hoffmann’s bromamide reaction.
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- Describe how would you distinguish the following pairs, (a) Benzene and cyclohexane (b) Phenol and toluene (c) Phenol and benzoic acidPredict the major products of the following reactions: (a) Nitration of bromobenzene (b) Bromination of nitrobenzene (c) Chlorination of phenol (d) Bromination of aniline(a) Account for the following :(i) Propanal is more reactive than propanone towards nucleophilic reagents.(ii) Electrophilic substitution in benzoic acid takes place at meta position.(iii) Carboxylic acids do not give characteristic reactions of carbonyl group.(b) Give simple chemical test to distinguish between the following pairs of compounds:(i) Acetophenone and benzaldehyde(ii) Benzoic acid and ethylbenzoate.
- Write a structural formula for each of the following compounds: (a) m-Chlorobenzoyl chloride (b) Trifluoroacetic anhydride (c) cis-1,2-Cyclopropanedicarboxylic anhydride (d) Ethyl cycloheptanecarboxylate (e) 1-Phenylethyl acetate (f) 2-Phenylethyl acetate (g) p-Ethylbenzamide (h) N-Ethylbenzamide (i) 2-Methylhexanenitrile(a) Although phenoxide ion has more number of resonating structures than carboxylate ion, carboxylic acid is a stronger acid than phenol. Give two reasons.(b) How will you bring about the following converstions?(i) Propanone to propane (ii) Benzoyl chloride to benzaldehyde(iii) Ethanal to but-2-enal(a) Give chemical tests to distinguish between(i) Phenol and Benzoic acid (ii) Benzophenone and Acetophenone
- Write the formula of reagents used in the following reactions:(i) Bromination of phenol to 2,4,6-tribromophenol(ii) Hydroboration of propene and then oxidation to propanol.(b) Arrange the following compound groups in the increasing order of their property indicated:(i) p-nitrophenol, ethanol, phenol (acidic character)(ii) Propanol, Propane, Propanal (boiling point)Write the structures of the following compounds:(a) Butyldiethylammonium bromide (b) Tetrabutylammonium hydroxide(c) Propylammonium iodide (d) Isopropylmethylammonium chloride(c) Arrange the following compounds in order of increasing acidity, and explain the reasons for your choice of order: phenol, cyclohexanol, 2-fluorocyclohexanol, 2-fluorophenol.
- (a) Draw the structures of the following compounds :(i) 4-Chloropentan-2-one (ii) p-Nitropropiophenone(b) Give tests to distinguish between the following pairs of compounds :(i) Ethanal and Propanal (ii) Phenol and Benzoic acid(iii) Benzaldehyde and Acetophenone(a) Give chemical tests to distinguish between the following pairs of compounds :(i) Pentan-2-ol and Pentan-3-ol (ii) Methanol and Phenol(b) o-nitro phenol is more acidic than o-methoxy phenol. Explain why.(a) Account for the following :(i) Cl – CH2COOH is a stronger acid than CH3COOH.(ii) Carboxylic acids do not give reactions of carbonyl group.(b) Write the chemical equations to illustrate the following name reactions:(i) Rosenmund reduction (ii) Cannizzaro’s reaction(c) Out of CH3CH2 – CO – CH2 – CH3 and CH3CH2 – CH2 – CO – CH3, which gives iodoform test?