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KCET2010ChemistryGeneral Organic Chemistry

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

Options

  1. Ageometrical isomerism
  2. Boptical isomerism
  3. Cneither optical nor geometrical isomerism
  4. Dboth optical and geometrical isomerism

Correct answer

B. optical isomerism

Step-by-step solution

When acetaldehyde is treated with aqueous sodium hydroxide solution, it undergoes aldol condensation (because of the presence of - H atom) as. Since, the aldol formed contains one asymmetric carbon atom, it will show optical isomerism. On heating, aldol loses water and gives an alkene. The obtained alkene shows geometrical isomerism.

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