According to Bronsted lowry, water is a/an

Options

A. Base
B. Acid
C. Acid and base both
D. Salt

Explanation

To determine the classification of water (H₂O) according to the Bronsted-Lowry theory, we need to analyze its behavior as both an acid and a base.

### Step-by-Step Solution:

1. **Understanding Bronsted-Lowry Theory**:
- According to the Bronsted-Lowry theory, an acid is defined as a substance that donates protons (H⁺ ions), while a base is defined as a substance that accepts protons.

2. **Water as an Acid**:
- When water (H₂O) dissociates, it can donate a proton (H⁺) to form hydroxide ions (OH⁻):
\[ H_2O \rightarrow H^+ + OH^- \]
- In this reaction, water acts as an acid because it donates a proton.

3. **Water as a Base**:
- Water can also accept a proton. For example, when water reacts with a proton (H⁺), it forms hydronium ions (H₃O⁺):
\[ H_2O + H^+ \rightarrow H_3O^+ \]
- In this case, water acts as a base because it accepts a proton.

4. **Conclusion**:
- Since water can both donate and accept protons, it is classified as **amphoteric**. This means that water can act as both an acid and a base according to the Bronsted-Lowry theory.

### Final Answer:
According to Bronsted-Lowry theory, water is an **amphoteric substance**.