Chemical Reactions of Aldehydes and Ketones

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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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Compound which gives cannizzaro reaction?

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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

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Total number of aldol condensation products are (excluding stereoisomer)

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

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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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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.

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

(i) Acetophenone and Benzophenone

(ii) Ethanal and Propanal

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IMPORTANT

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

(i) Acetophenone and Benzophenone

(ii) Ethanal and Propanal