Which of the following reaction does not produce ethyne ?

Options

A. `CH_3Cl and Ag`
B. `CaC_2 and H_2 O`
C. `CHI _ 3 and Ag`
D. All are equally reactive

Answer

To determine which reaction does not produce ethyne (C2H2), we need to analyze the given reactions one by one.

### Step-by-Step Solution:

1. **Identify the Reactions**:
We need to evaluate the reactions provided in the options. The key is to check if ethyne (C2H2) is produced in each reaction.

2. **Reaction of Methyl Chloride with Silver**:
- The reaction of methyl chloride (CH3Cl) with silver (Ag) forms silver chloride (AgCl) and produces ethyne.
- The balanced equation is:
\[ 2 \text{CH}_3\text{Cl} + 2 \text{Ag} \rightarrow 2 \text{AgCl} + \text{C}_2\text{H}_2 \]
- **Conclusion**: This reaction produces ethyne.

3. **Hydrolysis of Calcium Carbide**:
- Calcium carbide (CaC2) reacts with water (H2O) to produce ethyne.
- The balanced equation is:
\[ \text{CaC}_2 + 2 \text{H}_2\text{O} \rightarrow \text{Ca(OH)}_2 + \text{C}_2\text{H}_2 \]
- **Conclusion**: This reaction also produces ethyne.

4. **Reaction of Iodoform with Silver**:
- Iodoform (CHI3) reacts with silver to produce ethyne.
- The balanced equation is:
\[ \text{CHI}_3 + 3 \text{Ag} \rightarrow \text{C}_2\text{H}_2 + 3 \text{AgI} \]
- **Conclusion**: This reaction produces ethyne as well.

5. **Final Evaluation**:
- After analyzing all the reactions, we find that the reaction of methyl chloride with silver does not produce ethyne. Instead, it produces ethane (C2H6).
- Therefore, the correct answer is the reaction that does not produce ethyne.

### Final Answer:
The reaction that does not produce ethyne is the reaction of methyl chloride with silver.