Ethylene can be formed by electrolysis of which sodium salt

Options

A. oxalic acid
B. fumaric acid
C. glutaric acid
D. Succinic acid

Answer

To solve the question of which sodium salt can produce ethylene (ethene) through electrolysis, we will analyze the given options step by step.

### Step-by-Step Solution:

1. **Understanding the Reaction**:
- Ethylene (C2H4) is an alkene, which means it contains a carbon-carbon double bond. The formation of alkenes through electrolysis of sodium salts of carboxylic acids is known as col-base electrolysis.

2. **Identifying the Sodium Salts**:
- The options provided are:
- A) Oxalic acid
- B) Fumaric acid
- C) Glutaric acid
- D) Succinic acid

3. **Analyzing Succinic Acid**:
- Succinic acid (C4H6O4) has the structure:
\[ HOOC-CH2-CH2-COOH \]
- The sodium salt of succinic acid would be:
\[ HOOC-CH2-CH2-COONa \]

4. **Electrolysis of Sodium Salt of Succinic Acid**:
- When the sodium salt of succinic acid undergoes electrolysis, it dissociates into carboxylate ions and sodium ions:
\[ 2 \text{CH}_2\text{COONa} \rightarrow 2 \text{CH}_2\text{COO}^- + 2 \text{Na}^+ \]
- The carboxylate ions can then undergo a reaction that leads to the formation of ethylene:
\[ \text{CH}_2\text{COO}^- \rightarrow \text{C}_2\text{H}_4 + 2 \text{CO}_2 + \text{H}_2 \]

5. **Conclusion**:
- From the analysis, we find that the sodium salt of succinic acid can produce ethylene upon electrolysis. Therefore, the correct answer is:
- **D) Succinic acid**