The conversion of an alkyl halide into an alcohol by aqueous NaOH is classified as

Options

A. a dehydrohalogenation reaction
B. a substitution reaction
C. an addition reaction
D. a dehydration reaction

Explanation

To solve the question regarding the classification of the conversion of an alkyl halide into an alcohol by aqueous NaOH, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Reactants and Products**:
- The reactant is an alkyl halide (R-X, where R is the alkyl group and X is the halogen).
- The product is an alcohol (R-OH).

2. **Understand the Reaction Mechanism**:
- When an alkyl halide reacts with aqueous sodium hydroxide (NaOH), the hydroxide ion (OH⁻) acts as a nucleophile.
- The nucleophile attacks the carbon atom bonded to the halogen (X), leading to the substitution of the halogen with the hydroxyl group (OH).

3. **Classify the Type of Reaction**:
- This process involves the replacement of one functional group (the halogen) with another (the hydroxyl group).
- Since one group is substituted for another, this reaction is classified as a **substitution reaction**.

4. **Conclusion**:
- Therefore, the conversion of an alkyl halide into an alcohol by aqueous NaOH is classified as a **substitution reaction**.

### Final Answer:
The conversion of an alkyl halide into an alcohol by aqueous NaOH is classified as a **substitution reaction**.

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