Aldehydes, Ketones and Carboxylic Acids

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

Nucleophilic addition reaction will be most favoured in

1. CH3CHO
2. CH3-CH2-CH2- O \|C-CH3
3. (CH3)2C=O
4. CH3CH2CHO