Question

Ozonolysis of 2, 3 dimethyl but-2-ene, followed by decomposition by Zn dust and water gives:

• A. acetaldehyde
• B. propionaldehyde and acetone
• C. acetaldehyde and butyraldehyde
• D. acetalaldehyde and butyraldehyde

Hint:

Ozonolysis is commonly used to break alkenes into two carbonyl compounds, which can be aldehydes or ketones depending on the structure.

Answer 1

The Correct Option is B

Step 1: Analyze the ozonolysis reaction.
Ozonolysis of an alkene involves the addition of ozone (\( \text{O}_3 \)), followed by cleavage of the double bond. In this case, ozonolysis of 2, 3 dimethyl but-2-ene will break the carbon-carbon double bond. Step 2: Products of ozonolysis.
The ozonolysis of 2, 3 dimethyl but-2-ene will produce two aldehydes: \[ \text{CH}_3 \text{CHO} \, (\text{acetaldehyde}) \quad \text{and} \quad \text{CH}_3 \text{CO} \quad (\text{acetone}). \] After decomposition with Zn dust and water, the products will be acetaldehyde and acetone. Thus, the correct answer is (B).