STATEMENT-1 : pH of water at `25^(@)C` is less than the pH at `4^(@)C.`
STATEMENT-2: Water is more ac idic at `25^(@)C` then at `4^(@)C.`
STATEMENT-3: Water is netureal at all temperatures

Options

A. T F T
B. F F T
C. F T T
D. T T F

Answer

To analyze the statements provided in the question, we will evaluate each statement one by one based on our understanding of the properties of water and pH.

### Step-by-Step Solution:

1. **Understanding pH and Temperature**:
- The pH of water is a measure of the concentration of hydrogen ions (H⁺) in the solution. The relationship between pH and temperature is important because the ionization of water is temperature-dependent.
- At 25°C, the pH of pure water is approximately 7. At 4°C, the pH is slightly higher than 7.

**Hint**: Recall that pH is defined as -log[H⁺], and the concentration of H⁺ ions changes with temperature.

2. **Evaluating Statement 1**:
- **Statement 1**: "pH of water at 25°C is less than the pH at 4°C."
- As temperature increases, the ionization of water increases, leading to a higher concentration of H⁺ ions. Therefore, the pH decreases.
- Since the pH at 25°C is lower than at 4°C, this statement is **true**.

**Hint**: Remember that a lower pH indicates a higher concentration of H⁺ ions.

3. **Evaluating Statement 2**:
- **Statement 2**: "Water is more acidic at 25°C than at 4°C."
- Acidity is determined by the concentration of H⁺ ions. Since water is neutral at both temperatures (pH = 7), it cannot be more acidic at one temperature compared to the other.
- Therefore, this statement is **false**.

**Hint**: Consider the definition of acidity and how it relates to pH values.

4. **Evaluating Statement 3**:
- **Statement 3**: "Water is neutral at all temperatures."
- Water remains neutral as long as the concentration of H⁺ ions equals the concentration of OH⁻ ions. This is true for pure water at all temperatures.
- Therefore, this statement is **true**.

**Hint**: Neutrality in water means equal concentrations of H⁺ and OH⁻ ions.

### Conclusion:
- **Statement 1**: True
- **Statement 2**: False
- **Statement 3**: True

Thus, the correct evaluation of the statements is that Statement 1 and Statement 3 are true, while Statement 2 is false.

### Final Answer:
- **Option**: Statement 1 and Statement 3 are true; Statement 2 is false.