On heating oxalic acid with `H_2SO_4` , we get

Options

A. `H_2CO_3`
B. `CO_2 and O_2 `
C. `CO_2 and CO `
D. `H_2CO_3 + CO_2 + O_2 `

Answer

To solve the question regarding the products formed when oxalic acid is heated with concentrated sulfuric acid (H₂SO₄), we can follow these steps:

### Step 1: Understand the Reactants
Oxalic acid (C₂H₂O₄) is a dicarboxylic acid. When it is heated, especially in the presence of a strong dehydrating agent like concentrated sulfuric acid, it undergoes decomposition.

**Hint:** Identify the structure and formula of oxalic acid to understand its components.

### Step 2: Identify the Role of Sulfuric Acid
Concentrated sulfuric acid is known to act as a dehydrating agent. This means it can remove water (H₂O) from the reactants during the reaction.

**Hint:** Recall the properties of sulfuric acid and its behavior when mixed with organic compounds.

### Step 3: Write the Decomposition Reaction
When oxalic acid is heated with sulfuric acid, it decomposes to form carbon dioxide (CO₂) and carbon monoxide (CO), along with water. The balanced reaction can be represented as:
\[ \text{C}_2\text{H}_2\text{O}_4 \xrightarrow{\text{H}_2\text{SO}_4} \text{CO}_2 + \text{CO} + \text{H}_2\text{O} \]

**Hint:** Consider the products of thermal decomposition reactions of organic acids.

### Step 4: Identify the Products
From the decomposition reaction, we can see that the products formed are carbon dioxide (CO₂) and carbon monoxide (CO).

**Hint:** Check the stoichiometry of the reaction to confirm the products formed.

### Step 5: Conclusion
Thus, when oxalic acid is heated with concentrated sulfuric acid, the main products are carbon dioxide (CO₂) and carbon monoxide (CO).

**Final Answer:** On heating oxalic acid with H₂SO₄, we get carbon dioxide (CO₂) and carbon monoxide (CO).

### Summary of the Solution Steps:
1. Identify the reactants (oxalic acid).
2. Understand the role of sulfuric acid as a dehydrating agent.
3. Write the decomposition reaction.
4. Identify the products formed.
5. Conclude with the final answer.