`Na_(2)C_(2)O_(4)+H_(2)SO_(4)(Conc.) to Na_(2)SO_(4)+CO+CO_(2)`

Options

A. For disproportionation reaction.
B. For comproportionation reaction.
C. For either intermolecular redox reaction or displacement reaction
D. For either thermal combination redox reaction or thermal decomposition redox reaction.

Answer

To solve the question regarding the reaction of sodium oxalate (Na₂C₂O₄) with concentrated sulfuric acid (H₂SO₄) to produce sodium sulfate (Na₂SO₄), carbon monoxide (CO), and carbon dioxide (CO₂), we will analyze the oxidation states of the elements involved and determine the type of reaction.

### Step-by-Step Solution:

1. **Identify the Reactants and Products:**
- Reactants: Na₂C₂O₄ (sodium oxalate) and H₂SO₄ (concentrated sulfuric acid).
- Products: Na₂SO₄ (sodium sulfate), CO (carbon monoxide), and CO₂ (carbon dioxide).

2. **Determine the Oxidation States:**
- For Na₂C₂O₄:
- Sodium (Na) has an oxidation state of +1.
- Oxygen (O) has an oxidation state of -2.
- Let the oxidation state of carbon (C) be X.
- The equation for the oxidation states is:
\[ 2(+1) + 2X + 4(-2) = 0 \]
Simplifying gives:
\[ 2 + 2X - 8 = 0 \implies 2X - 6 = 0 \implies 2X = 6 \implies X = +3 \]
- Therefore, in Na₂C₂O₄, the oxidation state of carbon is +3.

- For H₂SO₄:
- Hydrogen (H) has an oxidation state of +1.
- Sulfur (S) has an oxidation state of +6.
- Oxygen (O) has an oxidation state of -2.
- The oxidation state of sulfur in H₂SO₄ is +6.

3. **Analyze the Products:**
- For Na₂SO₄:
- Sodium (Na) is +1, sulfur (S) is +6, and oxygen (O) is -2.
- For CO:
- The oxidation state of carbon is +2.
- For CO₂:
- The oxidation state of carbon is +4.

4. **Compare the Oxidation States:**
- In the reactants:
- Carbon in Na₂C₂O₄: +3
- In the products:
- Carbon in CO: +2 (reduction)
- Carbon in CO₂: +4 (oxidation)

5. **Determine the Type of Reaction:**
- Since the carbon in Na₂C₂O₄ is both oxidized (to +4 in CO₂) and reduced (to +2 in CO), this indicates that the same element (carbon) is undergoing both oxidation and reduction.
- This is characteristic of a **disproportionation reaction**.

### Conclusion:
The reaction of sodium oxalate with concentrated sulfuric acid results in a disproportionation reaction, where carbon is simultaneously oxidized and reduced.