Aldehydes, Ketones and Carboxylic Acids

Aldehydes, Ketones and Carboxylic Acids
Class:XII / Unit:12

1. Which of the following does not undergoCannizzarro’s reaction?

2-Methylpropanal
Benzaldehyde
p-Methoxybenzaldehyde
2, 2-Dimethylpropanal

2. What is the test to differentiate between penta-2-one and pentan-3-one?

Benedict’s test
Iodoform test
Fehling’s test
Aldol condensation test

3. Benzoyl Chloride on reduction with H₂/Pd-BaSO₄ produces

benzoyl sulphate
benzaldehyde
benzyl alochol
benzoic acid

4. The product of hydrolysis of ozonide of 1-butene are

ethanol only
methanal only
ethanal and methanal
propanal and methanal

5. Which of the following will not give aldol condensation?

1-Phenylpropanone
Benzaldehyde
2-Methylpentanal
Phenyl acetaldehyde

6. Aldehydes other than formaldehyde react with Grignard’s reagent to give addition products which on hydrolysis give

tertiary alcohols
secondary alcohols
primary alcohols
carboxylic acids

7. The addition of HCN to carbonyl compounds is an example of

electrophilic addition
electromeric addition
nucleophilic addition
free radical addition

8. There is a large difference in the boiling points of butanal and butanal-1-oldueto

intermolecular hydrogen bonding in butanal
intermolecular hydrogen bonding in butan-1-ol
higher molecular mass of butan-1-ol
resonance shown by butanal

9. The oxidation of toluene to benzaldehyde by chromyl, chloride is called

Cannizzaro’s reaction
Etard reaction
Riemer-Tiemann reaction
Wurtz reaction

10. Propanone can be prepared from ethyne by

passing a mixture of ethyne and steam over a catalyst, magnesium at 420°C
passing a mixture of ethyne and ethanol over a catalyst zinc chromite
treating ethyne with iodine and NaOH
boiling ethyne with water in the presence of HgSO₄ and H₂SO₄