What is the major product formed when $\text{2-methyl-2-butene}$ reacts with ozone followed by zinc and water?

Solution

1. Ozonolysis cleaves the $\text{C=C}$ bond of $\text{2-methyl-2-butene}$.
2. The structure of $\text{2-methyl-2-butene}$ is ${\text{(CH}}_3{\text{)}}_2{\text{C=CHCH}}_3$.
3. Cleavage at the double bond yields ${\text{(CH}}_3{\text{)}}_2\text{C=O}$ and ${\text{CH}}_3\text{CHO}$.
4. These correspond to acetone and acetaldehyde.
5. Hence the answer is (A).