Aldehydes, Ketones and Carboxylic Acids

Carboxylic acids have higher boiling points than aldehydes, ketones and even alcohols of comparable molecular mass. It is due to their

1. formation of intramolecular H-bonding
2. formation of carboxylate ion
3. more extensive association of carboxylic acid via van der Waals' forces of attraction
4. formation of intermolecular H-bonding

Of the following, which is the product formed when cyclohexanone undergoes aldol condensation followed by heating?

1. [figure]
2. [figure]
3. [figure]
4. [figure]

Consider the reactions, [figure] Identify A, X, Y and Z.

1. A-Methoxymethane, X-Ethanol, Y-Ethanoic acid, Z-Semicarbazide.
2. A-Ethanal, X-Ethanol, Y-But-2-enal, Z-Semicarbazone.
3. A-Ethanol, X-Acetaldehyde, Y-Butanone, Z-Hydrazone.
4. A-Methoxymethane, X-Ethanoic acid, Y-Acetate ion, Z-Hydrazine.

Which of the following reagents would distinguish cis-cyclopentane-1,2-diol from the trans-isomer?

1. MnO2
2. Aluminium isopropoxide
3. Acetone
4. Ozone

The product formed by the reaction of an aldehyde with a primary amine is

1. carboxylic acid
2. aromatic acid
3. Schiff's base
4. ketone

The correct order of the strengths of the carboxylic acids [figure] is

1. I > II > III
2. II > III > I
3. III > II > I
4. II > I > III

The correct structure of the product 'A' formed in the reaction [figure]

1. [figure]
2. [figure]
3. [figure]
4. [figure]

Reaction of a carbonyl compound with one of the following reagents involves nucleophilic addition followed by elimination of water. The reagent is

1. hydrazine in presence of feebly acidic solution
2. hydrocyanic acid
3. sodium hydrogen sulphate
4. a Grignard reagent.

Which one of the following esters gets hydrolysed most easily under alkaline conditions?

1. [figure]
2. [figure]
3. [figure]
4. [figure]

Treatment of cyclopentanone [figure] with methyl lithium gives which of the following species ?

1. Cyclopentanonyl radical
2. Cyclopentanonyl biradical
3. Cyclopentanonyl anion
4. Cyclopentanonyl cation