The compound formed when malonic acid is heated with urea, is `:`

Options

A. Cinnamic acid
B. Butyric acid
C. Barbituric acid
D. Crotonic acid

Explanation

To determine the compound formed when malonic acid is heated with urea, we can follow these steps:

### Step 1: Identify the Reactants
- **Malonic Acid**: The chemical formula is \( \text{C}_3\text{H}_4\text{O}_4 \) or structurally \( \text{HOOC-CH}_2\text{COOH} \).
- **Urea**: The chemical formula is \( \text{NH}_2\text{CO}\text{NH}_2 \).

### Step 2: Understand the Reaction
When malonic acid is heated with urea, a condensation reaction occurs. This means that water is removed as the two reactants combine to form a new compound.

### Step 3: Write the Reaction
The hydroxyl groups (-OH) from malonic acid and the amine groups (-NH2) from urea will react to form water. The reaction can be summarized as follows:
- Two molecules of water are eliminated during the reaction.

### Step 4: Identify the Product
The product formed is a derivative of barbituric acid. The structure can be represented as:
- \( \text{C}_4\text{H}_4\text{N}_2\text{O}_3 \) (Barbituric acid).

### Step 5: Conclusion
The compound formed when malonic acid is heated with urea is **barbituric acid**.

### Final Answer
The correct answer is barbituric acid.

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