Which of the following aldehydes is prepared by the ozonolysis of propene followed by hydrolysis?
Ozonolysis of propene (CH₃CH\=CH₂) cleaves the double bond, forming ethanal (CH₃CHO) and methanal (HCHO) after hydrolysis.
Ref: NCERT Class 12 Chemistry > Chapter 12: Aldehydes, Ketones and Carboxylic Acids > Topic: Reactions due to α-Hydrogen - Aldol, Cannizzaro and Acidity of Carboxylic Acids