Question

The unsaturated hydrocarbon which on ozonolysis gives one mole each of formaldehyde, acetaldehyde and methyl glyoxal (CH₃COCHO) is

• A. CH₃–CH=C(CH₃)–CH₃
• B. CH₂=CH–CH₂–CH=CH₂
• C. CH₂=CH–C(CH₃)=CH–CH₃
• D. (CH₃)₂C=CH–CH₃

Hint:

Always break each C=C bond into two carbonyl groups during ozonolysis.

Answer 1

The Correct Option is B

Step 1: Ozonolysis cleaves each double bond into carbonyl compounds.
Step 2: 1,4-pentadiene on ozonolysis gives formaldehyde and glyoxal derivatives.