Aldehydes, Ketones and Carboxylic Acids

Among the given compounds, the most susceptible to nucleophilic attack at the carbonyl group is

1. CH3COOCH3
2. CH3CONH2
3. CH3COOCOCH3
4. CH3COCl

Propionic acid with Br2/P yields a dibromo product. Its structure would be

1. [figure]
2. CH2(Br)-CH2-COBr
3. [figure]
4. CH2(Br)-CH(Br)-COOH

A strong base can abstract an α-hydrogen from

1. ketone
2. alkane
3. alkene
4. amine

The relative reactivities of acyl compounds towards nucleophilic substitution are in the order of

1. Acid anhydride > Amide > Ester > Acyl chloride
2. Acyl chloride > Ester > Acid anhydride > Amide
3. Acyl chloride > Acid anhydride > Ester > Amide
4. Ester > Acyl chloride > Amide > Acid anhydride.

Acetophenone when reacted with a base, C2H5ONa, yields a stable compound which has the structure

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

Reduction of aldehydes and ketones into hydrocarbons using zinc amalgam and conc. HCl is called

1. Cope reduction
2. Dow reduction
3. Wolff-Kishner reduction
4. Clemmensen reduction

The product formed in Aldol condensation is

1. a beta-hydroxy aldehyde or a beta-hydroxy ketone
2. an alpha-hydroxy aldehyde or ketone
3. an alpha, beta unsaturated ester
4. a beta-hydroxy acid.

Which one of the following on treatment with 50% aqueous sodium hydroxide yields the corresponding alcohol and acid?

1. C6H5CHO
2. CH3CH2CH2CHO
3. CH3- O \|C-CH3
4. C6H5CH2CHO

Which of the following represents the correct order of the acidity in the given compounds ?

1. FCH2COOH > CH3COOH > BrCH2COOH > ClCH2COOH
2. BrCH2COOH > ClCH2COOH > FCH2COOH > CH3COOH
3. FCH2COOH > ClCH2COOH > BrCH2COOH > CH3COOH
4. CH3COOH > BrCH2COOH > ClCH2COOH > FCH2COOH

A carbonyl compound reacts with hydrogen cyanide to form cyanohydrin which on hydrolysis forms a racemic mixture of α-hydroxy acid. The carbonyl compound is

1. formaldehyde
2. acetaldehyde
3. acetone
4. diethyl ketone