when oxalic acid is heated with glycerol we get :

Options

A. Formic acid
B. Acetic acid
C. Lactic acid
D. Tartaric acid

Answer

To solve the question of what product is formed when oxalic acid is heated with glycerol, we can follow these steps:

### Step-by-Step Solution:

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

2. **Heating the Mixture**: When oxalic acid is heated with glycerol, the heat causes a reaction between the two compounds. The temperature needs to be sufficiently high to facilitate the reaction.

3. **Dehydration Reaction**: During heating, water (H₂O) is eliminated from the mixture. This is a dehydration reaction, which is common when organic compounds are heated together.

4. **Formation of Mono-Oxalate**: As a result of the reaction, a compound known as glycerol mono-oxalate is formed. This compound has the structure that includes the glycerol backbone and one oxalic acid unit.

5. **Decarboxylation**: The glycerol mono-oxalate can undergo further reactions, including decarboxylation, where carbon dioxide (CO₂) is released.

6. **Final Product Formation**: After the decarboxylation step, the final product formed is formic acid (HCOOH).

### Conclusion:
When oxalic acid is heated with glycerol, the final product is formic acid (HCOOH).