Explain why thionyl chloride method is preferred for preparation alkyl chlorides from alcohols?

Explanation

### Step-by-Step Solution:

1. **Understanding the Reactants:**
- Alcohols contain a hydroxyl group (-OH) which is the functional group responsible for their properties. In this case, we denote a general alcohol as R-OH, where R represents the alkyl group.

2. **Introducing Thionyl Chloride:**
- Thionyl chloride (SOCl2) is a chlorinating agent that is commonly used to convert alcohols into alkyl chlorides. When thionyl chloride is added to an alcohol, it reacts with the hydroxyl group.

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