Question:

A and B in the following reactions are : 
HCN/KCN

Updated On: Apr 21, 2025
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The Correct Option is D

Solution and Explanation

When a ketone undergoes a reaction with HCN, it results in the formation of a cyanohydrin. The cyanohydrin that is produced in this manner can then be further reduced to yield a primary amine by the use of LiAlH4.
So, the correct option is (D).
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Concepts Used:

Aldehydes, Ketones and Carboxylic Acids - Chemical Reactions

Chemical Reactions of Aldehydes and Ketones:

Nucleophilic Addition Reactions
Nucleophilic Addition Reactions
Tollens’ test
Tollens’ Test
Fehling’s test
Fehling’s Test
Aldol condensation
Aldol Condensation
  • Cross aldol condensation
Cross aldol condensation
Cross Aldol Condensation
Cannizzaro reaction
Cannizzaro Reaction
Electrophilic Substitution Reaction
Electrophilic Substitution Reaction

Read Also: Aldehydes, Ketones, and Carboxylic Acids

Fischer Esterification
Fischer Esterification
Decarboxylation
Decarboxylation
Halogenation
Halogenation

Read More: Chemistry Named Reactions