Aldehydes, Ketones and Carboxylic Acids

The major product of the following reaction is [figure]

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

Which of the following reactions is not an example for nucleophilic addition-elimination reaction?

1. CH3CHO + NH3 CH3CH=NH + H2O
2. CH3CHO + NaHSO3 CH3- H | OH |C-SO3Na
3. CH3CHO + NH2OH CH3CH=N-OH + H2O
4. CH3CHO + C6H5NHNH2 CH3CH=N-NHC6H5 + H2O

The product formed from the following reaction sequence is [figure]

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

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

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.

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

Which one is most reactive towards nucleophilic addition reaction?

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

Consider the reaction : RCHO + NH2NH2 RCH = N - NH2 What sort of reaction is it?

1. Electrophilic addition-elimination reaction
2. Free radical addition-elimination reaction
3. Electrophilic substitution-elimination reaction
4. Nucleophilic addition-elimination reaction

Acetone is treated with excess of ethanol in the presence of hydrochloric acid. The product obtained is

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

The order of reactivity of phenyl magnesium bromide (PhMgBr) with the following compounds: [figure]

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

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

In a set of reactions acetic acid yielded a product D. CH3COOH SOCl2 A [anhy. AlCl3]benzene B HCN C HOH D The structure of D would be

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

A and B in the following reactions are : [figure]

1. [figure]
2. [figure]
3. A = RR'CHCN, B = NaOH
4. [figure]

First product of the reaction between RCHO and NH2NH2 is

1. RCH=NNH2
2. RCH=NH
3. RCH2NH2
4. RCON3