Haloalkanes contain halogen atom(s) attached to the `sp^(3)`hybridised carbon atom of an alkyl group. Identify haloalkane from the following compounds.

Options

A. 2-bromopentane
B. Vinyl chloride (chloroethane)
C. 2-chloroacetophenon
D. Trichloromethane

Explanation

To identify the haloalkane from the given compounds, we need to understand that haloalkanes are compounds where a halogen atom is attached to an sp³ hybridized carbon atom of an alkyl group. Let's analyze each compound step by step.

### Step-by-Step Solution:

1. **Identify the first compound: 2-bromopentane**
- The structure of 2-bromopentane consists of a five-carbon chain (pentane) with a bromine atom attached to the second carbon.
- The structure can be drawn as:
\[ CH_3-CH(Br)-CH_2-CH_2-CH_3 \]
- The second carbon is sp³ hybridized because it forms four single bonds (three with hydrogen and one with bromine).
- **Conclusion:** 2-bromopentane is a haloalkane.

2. **Identify the second compound: Vinyl chloride**
- The structure of vinyl chloride is:
\[ CH_2=CHCl \]
- The carbon atom to which chlorine is attached is involved in a double bond (sp² hybridized).
- **Conclusion:** Vinyl chloride is not a haloalkane.

3. **Identify the third compound: 2-chloroacetophenone**
- The structure of acetophenone is:
\[ C_6H_5-C(=O)-CH_3 \]
- In 2-chloroacetophenone, chlorine is attached to the carbon adjacent to the carbonyl group:
\[ C_6H_5-C(Cl)-C(=O)-CH_3 \]
- The carbon atom to which chlorine is attached is sp² hybridized (part of the benzene ring).
- **Conclusion:** 2-chloroacetophenone is not a haloalkane.

4. **Identify the fourth compound: Trichloromethane (chloroform)**
- The structure of trichloromethane is:
\[ CHCl_3 \]
- The carbon atom in trichloromethane is bonded to three chlorine atoms and one hydrogen atom, forming four single bonds.
- This carbon is sp³ hybridized.
- **Conclusion:** Trichloromethane is a haloalkane.

### Final Answer:
The haloalkanes from the given compounds are **2-bromopentane** and **trichloromethane**.