Which of the following reactions can be used to prepare an alkane from an alkyl halide ?

Options

A. Wurtz reaction
B. Kobe electrolysis
C. Hoffmann reaction
D. Fitting reaction

Explanation

To determine which reaction can be used to prepare an alkane from an alkyl halide, we will analyze the given reactions step by step.

### Step 1: Understand the Reactions
We need to identify the reactions listed in the question and their relevance to converting alkyl halides to alkanes.

### Step 2: Analyze Each Reaction
1. **Friedel-Crafts Reaction**: This reaction is primarily used for the alkylation or acylation of aromatic compounds. It does not involve alkyl halides directly converting to alkanes. Therefore, this is not a suitable option.

2. **Hofmann Reaction**: The Hofmann reaction is used to convert primary amides into primary amines with the loss of one carbon atom. It does not involve alkyl halides or the formation of alkanes. Hence, this option is also not applicable.

3. **Cobelectrolysis**: This reaction involves the electrolysis of carboxylic acids or their salts. It does not pertain to alkyl halides and is not used to form alkanes. Thus, this option is not relevant.

4. **Wurtz Reaction**: The Wurtz reaction involves the coupling of alkyl halides in the presence of sodium metal to form higher alkanes. This reaction is specifically designed to convert alkyl halides into alkanes. Therefore, this is the correct option.

### Conclusion
The reaction that can be used to prepare an alkane from an alkyl halide is the **Wurtz reaction**.

### Final Answer
**Option D: Wurtz Reaction is the correct answer.**

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