Question

Which of the following can not be obtained when alkenes are oxidised with with $KMn{O}_4$ and then followed by acid hydrolysis ?

• A. alkanoic acids
• B. alkanals
• C. alkanones
• D. carbon dioxide

Answer 1

The correct option is A alkanoic acids

Since $KMn{O}_4$ is a strong oxidizing agent, it oxidizes the compound into carboxylic acid. However a compound containing double bond in secondary carbon may end up being oxidized to ketones. Hence aldehydes cannot be obtained when alkenes are oxidized with $KMn{O}_4$