1. Tardigrade
  2. Question
  3. Chemistry
  4. The compound obtained when acetaldehyde reacts with dilute aqueous sodium hydroxide exhibits

Question Error Report

Thank you for reporting, we will resolve it shortly

Back to Question

Q. The compound obtained when acetaldehyde reacts with dilute aqueous sodium hydroxide exhibits

KCETKCET 2010Aldehydes Ketones and Carboxylic Acids

Solution:

When acetaldehyde is treated with aqueous sodium hydroxide solution, it undergoes aldol condensation (because of the presence of $\alpha- H$ atom) as.

image

Since, the aldol formed contains one asymmetric carbon atom, it will show optical isomerism.

On heating, aldol loses water and gives an alkene.

$CH _{3} CH ( OH ) CH _{2} CHO \stackrel{\Delta}{\longrightarrow } \underset{\text{(shows geometrical isomerism)}}{CH_3CH = CHCHO}$

The obtained alkene shows geometrical isomerism.