Question

10. Give three general methods of preparation of
aldehyde. How does aldehyde differ from
ketone ? Illustrate with three examples.​

Answer 1

Answer:

Oxidation of primary and secondary alcohols leads to the formation of aldehydes and ketones. The oxidation is possible with the help of common oxidizing agents are KMnO4, K2Cr2O7, and CrO3. Strong oxidizing agents helps in the oxidation of the primary alcohol to aldehyde then to a carboxylic acid.

Answer 2

Question

• Give three general methods of preparation of aldehyde. How does aldehyde differ from ketone ?

Answer

General Method

• By Oxidation of Alcohol. After the oxidation of primary and secondary alcohols we can get both aldehydes and ketones. ...
• Dehydrogenation of Alcohols. This is widely used in industries. ...
• From Hydrocarbons. ...
• By Oxidation of Methylbenzene.

Differences

• You will remember that the difference between an aldehyde and a ketone is the presence of a hydrogen atom attached to the carbon-oxygen double bond in the aldehyde. Ketones don't have that hydrogen. ... Aldehydes are easily oxidized by all sorts of different oxidizing agents: ketones are not.