Which of the folliwng haldies can yield ethane and also methane in a single step?

Options

A. `C_(2)H_(5)Br`
B. `CH_(2)I`
C. `(CH_(3))_(2)CHBr`
D. None

Explanation

To determine which halide can yield both ethane and methane in a single step, we will analyze the reactions of iodomethane (CH3I).

### Step-by-Step Solution:

1. **Identify the Halide**: The halide in question is iodomethane (CH3I).

2. **Formation of Ethane**:
- To produce ethane (C2H6) from iodomethane, we can use the **Wurtz Reaction**. This reaction involves the coupling of alkyl halides in the presence of sodium metal (Na) and an ether solvent.
- The reaction can be represented as follows:
\[ 2 \, \text{CH}_3\text{I} + 2 \, \text{Na} \xrightarrow{\text{ether}} \text{C}_2\text{H}_6 + 2 \, \text{NaI} \]
- Here, two moles of iodomethane react with sodium to form ethane and sodium iodide.

3. **Formation of Methane**:
- To produce methane (CH4) from iodomethane, we can react it with red phosphorus (P) and hydrogen iodide (HI).
- The reaction can be represented as follows:
\[ \text{CH}_3\text{I} + \text{P} + \text{HI} \rightarrow \text{CH}_4 + \text{PI}_3 \]
- In this reaction, iodomethane reacts to yield methane along with phosphorus triiodide.

4. **Conclusion**:
- Since iodomethane can yield both ethane and methane in separate reactions, it is the correct answer to the question. Therefore, the halide that can yield ethane and methane in a single step is **iodomethane (CH3I)**.

### Final Answer:
The halide that can yield ethane and methane in a single step is **iodomethane (CH3I)**.

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