Chemical Reactions of Aldehydes and Ketones

IMPORTANT

Chemical Reactions of Aldehydes and Ketones: Overview

This Topic covers sub-topics such as Cannizzaro's Reaction, Aldol Condensation, Cross-Aldol Condensation, Haloform Reaction, Clemmensen's Reduction, Chemical Properties of Aldehydes and Ketones and, Reduction Reactions of Aldehydes and Ketones

Important Questions on Chemical Reactions of Aldehydes and Ketones

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IMPORTANT

Compound which gives cannizzaro reaction?

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IMPORTANT

HCHO Conc NaOH (x) + (y)

Given reaction is an example of

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HCHO Conc NaOH (x) + (y)

Given reaction is an example of

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HCHO Conc NaOH (x) + (y)

Oxidation number of carbon changes from

HARD
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Total number of aldol condensation products are (excluding stereoisomer)

MEDIUM
IMPORTANT

Reduction of the carbonyl group of aldehydes and ketones on treatment with hydrazine followed by heating with potassium hydroxide is known as

EASY
IMPORTANT

Name the following reactions:

(i) The carbonyl group of aldehyde and ketones is reduced to -CH2 group on treatment with zinc amalgam and concentrated hydrochloric acid.

(ii) Aldehydes that do not contain any α-hydrogen atom undergo self-oxidation and reduction reaction on treatment with concentrated alkali.

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The chemical tests to distinguish between the following pairs of compounds are:

(i) Propanal and propanone

(ii) Acetophenone and benzophenone

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IMPORTANT

Write the name of following chemical reactions.

(i) Aldehydes which do not contain an  α-hydrogen atom, when treated with a concentrated alkali solution undergo self-oxidation–reduction.

(ii) Carboxylic acids react with chlorine or bromine in the presence of phosphorous to give compounds in which a hydrogen atom is replaced by a halogen atom.

EASY
IMPORTANT

The following pairs of compounds can be distinguished by which of the following test:

(i) Acetophenone and Benzophenone

(ii) Ethanal and Propanal

MEDIUM
IMPORTANT

The following pairs of compounds can be distinguished by which of the following test:

(i) Acetophenone and Benzophenone

(ii) Ethanal and Propanal