Question

An alkene X on ozonolysis gives a mixture of Propan-2-one and methanal. What is X?

• A. Propene
• B. 2-Methylpropene
• C. 2-Methylbut-1-ene
• D. 2-Methylbut-2-ene

Hint:

Ozonolysis breaks double bonds into carbonyl compounds—trace back the products to determine the alkene.

Answer 1

The Correct Option is B

Step 1: Understanding Ozonolysis 
- Ozonolysis of an alkene breaks the double bond and forms aldehydes and ketones. 
- Identifying the correct alkene requires reversing this process. 
Step 2: Identifying the Structure of X 
The products given are Propan-2-one (\( CH_3COCH_3 \)) and methanal (\( HCHO \)).
The only alkene that produces these fragments is 2-Methylpropene (\( CH_3 - C(CH_3) = CH_2 \)).
Final Answer: The correct alkene is 2-Methylpropene.