Name an alkene which on reductive ozonolysis gives only acetone.

Explanation

To solve the question of naming an alkene that, upon reductive ozonolysis, yields only acetone, we can follow these steps:

### Step 1: Understand the Process of Reductive Ozonolysis
Reductive ozonolysis is a reaction where an alkene is treated with ozone (O3) followed by a reducing agent (commonly Zn and water). This reaction cleaves the double bond of the alkene and forms carbonyl compounds (aldehydes or ketones).

### Step 2: Identify the Product
The question specifies that the product should be only acetone (CH3COCH3). Acetone is a ketone with the structure of two methyl groups attached to a carbonyl group.

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