Give IUPAC name of the following :
`C_(6)H_(5)-CH= CH-CO-CH_(2)-CH_(3)`

Explanation

To derive the IUPAC name of the compound \( C_6H_5-CH=CH-CO-CH_2-CH_3 \), we will follow these steps:

### Step 1: Identify the Structure
The compound consists of a benzene ring (C6H5) attached to an aliphatic chain. The structure can be represented as follows:
- A benzene ring (C6H5)
- A double bond (C=C)
- A carbonyl group (C=O) indicating a ketone
- An ethyl group (CH2-CH3)
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