Aspirin on hydrolysis in the stomach gives _______ which cause _______

Answer

**Step-by-Step Solution:**

1. **Identify Aspirin's Chemical Structure**: Aspirin, chemically known as acetylsalicylic acid, has the molecular structure that includes a benzene ring, a carboxylic acid group (C=O and -OH), and an acetyl group (-OCOCH3).

2. **Understand Hydrolysis**: Hydrolysis is a chemical reaction involving the breaking of a bond in a molecule using water. In the case of aspirin, this reaction occurs in the acidic environment of the stomach.

3. **Reaction of Aspirin in the Stomach**: When aspirin undergoes hydrolysis in the stomach, it reacts with water and breaks down into its components. The primary product of this hydrolysis is salicylic acid.

4. **Write the Hydrolysis Reaction**: The hydrolysis of aspirin can be represented as:
\[ \text{Aspirin} + \text{H}_2\text{O} \rightarrow \text{Salicylic Acid} + \text{Acetic Acid} \]
This means that aspirin reacts with water to produce salicylic acid and acetic acid.

5. **Effect of Salicylic Acid**: Salicylic acid, the product of aspirin hydrolysis, is known to irritate the stomach lining, which can lead to the formation of ulcers.

6. **Final Answer**: Therefore, the complete answer to the question is: Aspirin on hydrolysis in the stomach gives **salicylic acid**, which causes **ulcers**.

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