Ethyne is formed when as aqueous solution of _____ is electrolyzed.

Options

A. Sodium acetate
B. sodium succinate
C. sodium furnarate
D. sodium formate

Explanation

To determine the compound that, when electrolyzed in an aqueous solution, forms ethyne (C2H2), we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Electrolysis Process**: Electrolysis is a process that uses electrical energy to drive a chemical reaction. In the case of ethyne formation, we need to find a precursor compound that can yield ethyne upon electrolysis.

2. **Consider Common Compounds**: One common compound that can be electrolyzed to produce ethyne is sodium acetylide. Sodium acetylide can be represented as sodium ethynide (NaC≡CH).

3. **Hydrolysis of Sodium Acetylide**: When sodium acetylide is dissolved in water, it undergoes hydrolysis. This reaction can be represented as:
\[ \text{NaC} \equiv \text{CH} + \text{H}_2\text{O} \rightarrow \text{C}_2\text{H}_2 + \text{NaOH} \]
Here, water reacts with sodium acetylide to produce ethyne and sodium hydroxide.

4. **Electrolysis of the Aqueous Solution**: Upon electrolysis of the aqueous solution containing sodium acetylide, ethyne gas is liberated at the cathode.

5. **Final Conclusion**: Therefore, the aqueous solution that, when electrolyzed, forms ethyne is sodium acetylide (NaC≡CH).

### Final Answer:
Ethyne is formed when an aqueous solution of **sodium acetylide** is electrolyzed.

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