reaction of a carbonyl compound with one of the following

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

A. a Grignard reagent

B. hydrazine in presence of feebly acidic solution

C. hydrocyanic acid

D. sodium hydrogen sulphite

Answer : hydrazine in presence of feebly acidic solution

Solution :
Reaction of carbonyl compounds with one of the following reagents involves nucleophilic addition followed by elimination of water.
The reagent is hydrazine in presence of feebly acidic solution.
For example, the reaction between acetone and hydrazine to form hydrazone is shown below.
Aldehyde and Ketone mcq solution image

Releted MCQ Question on
Organic Chemistry >> Aldehyde and Ketone

Releted Question 1

The reagent with which both acetaldehyde and acetone react easily is

A. Fehling’s reagent

B. Grignard reagent

C. Schiff’s reagent

D. Tollen’s reagent

View Answer

Releted Question 2

The Cannizzaro reaction is not given by

A. trimethylacetaldehye

B. acetaldehyde

C. benzaldehyde

D. formaldehyde

View Answer

Releted Question 3

The compound that will not give iodoform on treatment with alkali and iodine is :

A. acetone

B. ethanol

C. diethyl ketone

D. isopropyl alcohol

View Answer

Releted Question 4

Polarisation of electrons in acrolein may be written as

A. $$\mathop {C{H_2}}\limits^{{\delta ^ - }} = CH - \mathop {CH}\limits^{{\delta ^ + }} = O$$

B. $$\mathop {C{H_2}}\limits^{{\delta ^ - }} = CH - CH = \mathop O\limits^{{\delta ^ + }} $$

C. $$\mathop {C{H_2}}\limits^{{\delta ^ - }} = \mathop {CH}\limits^{{\delta ^ + }} - CH = O$$

D. $$\mathop {C{H_2}}\limits^{{\delta ^ + }} = CH - CH = \mathop O\limits^{{\delta ^ - }} $$

View Answer

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

Releted MCQ Question on
Organic Chemistry >> Aldehyde and Ketone

The reagent with which both acetaldehyde and acetone react easily is

The Cannizzaro reaction is not given by

The compound that will not give iodoform on treatment with alkali and iodine is :

Polarisation of electrons in acrolein may be written as

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Aldehyde and Ketone

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

Releted MCQ Question on Organic Chemistry >> Aldehyde and Ketone

The reagent with which both acetaldehyde and acetone react easily is

The Cannizzaro reaction is not given by

The compound that will not give iodoform on treatment with alkali and iodine is :

Polarisation of electrons in acrolein may be written as

Practice More Releted MCQ Question on Aldehyde and Ketone

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Releted MCQ Question on
Organic Chemistry >> Aldehyde and Ketone

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Aldehyde and Ketone