Which isomer of `C_(4)H_(9)Cl` will have the lowest boiling point?

Explanation

To determine which isomer of C₄H₉Cl has the lowest boiling point, we need to analyze the possible isomers of butyl chloride and their structures.

### Step-by-Step Solution:

1. **Identify the Isomers of C₄H₉Cl**:
- The molecular formula C₄H₉Cl corresponds to butyl chloride. The possible isomers include:
- n-Butyl chloride (1-chlorobutane)
- sec-Butyl chloride (2-chlorobutane)
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