Which of the following reaction representes incorrect product

Options

A.
B.
C.
D. `{:(H-C-COOH),(" ||"),(H-C-COOH):} overset(Delta)toCH_(2)=CH-COOH+CO_(2)`

Explanation

To determine which reaction represents an incorrect product, we will analyze each option step by step.

### Step 1: Analyze Option A
- The compound given is CH2(OH)COOH (which is a hydroxy acid).
- Upon heating, it undergoes dehydration to form a product.
- The expected product is correct as per the reaction mechanism.
- **Conclusion:** Option A is correct.

**Hint for Step 1:** Check the functional groups and the expected reaction mechanism for dehydration.

### Step 2: Analyze Option B
- The reaction involves a different compound, which also undergoes a transformation upon heating.
- The removal of water leads to the formation of a product that is consistent with the expected outcome.
- **Conclusion:** Option B is also correct.

**Hint for Step 2:** Look for the removal of water and the formation of a stable product.

### Step 3: Analyze Option C
- Here, the compound is heated, and CO2 is released.
- The reaction leads to the formation of CH3COOH (acetic acid).
- This transformation is valid and follows the expected reaction pathway.
- **Conclusion:** Option C is correct.

**Hint for Step 3:** Consider the decarboxylation process and how it leads to the formation of carboxylic acids.

### Step 4: Analyze Option D
- In this reaction, the compound is heated, but the expected product is not formed.
- Instead, the reactant remains unchanged, indicating that the reaction does not proceed as expected.
- The expected product is incorrect based on the reaction conditions.
- **Conclusion:** Option D is incorrect.

**Hint for Step 4:** Evaluate whether the expected product aligns with the reaction conditions and the stability of the reactants.

### Final Conclusion
After analyzing all options, we find that the incorrect product is represented in **Option D**.