What alkyl halide would yield each of the following pure alkene on reaction with alcoholic KOH ?
`CH_(3)-CH_(2)-CH_(2)-CH=CH_(2)`

Explanation

To determine the alkyl halide that would yield the alkene `CH3-CH2-CH2-CH=CH2` (which is 1-pentene) upon reaction with alcoholic KOH, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Target Alkene**:
The target alkene is `CH3-CH2-CH2-CH=CH2`, which is 1-pentene. This compound has a total of 5 carbon atoms.

2. **Determine the Alkyl Halide Structure**:
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