Which acid is used in eyewash ?

Options

A. Citric acid
B. Tartaric acid
C. Acetic acid
D. Boric acid

Explanation

To determine which acid is used in eyewash solutions, we will analyze the properties and uses of the given acids: citric acid, tartaric acid, acetic acid, and boric acid.

### Step-by-Step Solution:

1. **Identify the Acids**: The acids provided are:
- Citric acid
- Tartaric acid
- Acetic acid
- Boric acid

2. **Research Each Acid's Uses**:
- **Citric Acid**:
- Structure: C6H8O7
- Commonly found in citrus fruits like lemons and oranges.
- Uses: Primarily used as a preservative and flavoring agent in food.
- **Tartaric Acid**:
- Structure: C4H6O6
- Found in grapes and used in baking.
- Uses: Used as a stabilizing agent in baking powder (cream of tartar).
- **Acetic Acid**:
- Structure: CH3COOH
- Known as vinegar when diluted.
- Uses: Commonly used as a food preservative and cleaning agent.
- **Boric Acid**:
- Structure: H3BO3
- Known for its antiseptic properties.
- Uses: Used as a mild antiseptic and is commonly found in eyewash solutions.

3. **Determine the Correct Acid for Eyewash**:
- After reviewing the uses of each acid, we find that boric acid is specifically noted for its antiseptic properties and is used in eyewash solutions to help soothe irritated eyes and maintain the pH balance of the solution.

4. **Conclusion**:
- The acid used in eyewash is **Boric Acid**.

### Final Answer:
The acid used in eyewash is **Boric Acid**.

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