If glycerol is heated with oxalic acid at a certain temperature , it gives an acid. The acid is

Options

A. Formic acid
B. Acetic acid
C. Pripionic acid
D. Benzoic acid

Explanation

To solve the problem of determining the acid formed when glycerol is heated with oxalic acid, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Reactants**:
- The reactants in this reaction are glycerol (C3H8O3) and oxalic acid (C2H2O4).

2. **Understand the Reaction Type**:
- The reaction between glycerol and oxalic acid is an esterification reaction. In this process, an alcohol (glycerol) reacts with a carboxylic acid (oxalic acid) to form an ester and water.

3. **Write the Reaction**:
- During the esterification, a hydroxyl group (OH) from oxalic acid and a hydrogen atom (H) from glycerol are removed, leading to the formation of water (H2O) and an ester.
- The general reaction can be represented as:
\[ \text{Glycerol} + \text{Oxalic Acid} \rightarrow \text{Glycerol Mono-Oxalate} + \text{H2O} \]

4. **Consider Further Heating**:
- Upon further heating, the glycerol mono-oxalate can undergo decarboxylation, where carbon dioxide (CO2) is released. This process can lead to the formation of a carbonyl compound.

5. **Identify the Products**:
- After the decarboxylation, the remaining structure can lead to the formation of formic acid (HCOOH) as one of the products.
- The overall reaction can be summarized as:
\[ \text{Glycerol Mono-Oxalate} \rightarrow \text{Glycerol} + \text{Formic Acid} \]

6. **Conclusion**:
- The acid formed in this reaction is **formic acid**.

### Final Answer:
The acid formed when glycerol is heated with oxalic acid is **formic acid** (HCOOH).

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