Ketones are reduced to the corresponding alcohols by catalytic hydroge...
Aldehydes and ketones can be reduced catalytically to form alcohols. When aldehydes and ketones are heated with hydrogen gas in presence of raney Nickel as a catalyst, then primary and secondary alcohols are obtained respectively .Reaction is carried out at high temperature of about 413 Kelvin.
View all questions of this test
Ketones are reduced to the corresponding alcohols by catalytic hydroge...
Ketones are reduced to the corresponding alcohols by catalytic hydrogenation to form secondary alcohols.
Explanation:
1. Catalytic Hydrogenation:
Catalytic hydrogenation is a chemical reaction in which hydrogen gas (H2) reacts with a compound in the presence of a catalyst to form a new compound. In the case of ketones, catalytic hydrogenation can be used to reduce the ketone functional group (C=O) to an alcohol functional group (-OH).
2. Reduction of Ketones:
Ketones contain a carbonyl group (C=O) in which the carbon atom is bonded to two other carbon atoms. During the catalytic hydrogenation reaction, the carbon-oxygen double bond of the ketone is broken, and the carbon atom is bonded to a hydrogen atom. This results in the formation of an alcohol functional group.
3. Formation of Secondary Alcohols:
The reduction of ketones by catalytic hydrogenation results in the formation of secondary alcohols. Secondary alcohols are characterized by the presence of an -OH group attached to a carbon atom that is bonded to two other carbon atoms. In other words, the carbon atom in the alcohol group is bonded to two alkyl groups.
4. Explanation of the Correct Answer:
The correct answer to the given question is option 'A' - secondary alcohols. This is because the reduction of ketones by catalytic hydrogenation specifically leads to the formation of secondary alcohols. Primary alcohols and tertiary alcohols are not formed in this reaction.
Therefore, when ketones undergo catalytic hydrogenation, they are reduced to form secondary alcohols.