Which of the following conditions help melting of ice?

Options

A. High pressure, temperature below `0^(@)C`
B. High pressure, temperature above `0^(@)C`
C. Low pressure, temperature above `0^(@)C`
D. Low pressure, temperature below `0^(@)C`

Explanation

To determine which conditions help in the melting of ice, we need to analyze the effects of temperature and pressure on the phase change from ice to water.

### Step-by-Step Solution:

1. **Understanding the Process**:
- Ice melting into water is an endothermic process, meaning it requires the absorption of heat.

2. **Effect of Temperature**:
- For ice to melt, the temperature must be above 0 degrees Celsius. At temperatures below 0 degrees Celsius, ice remains solid. Therefore, increasing the temperature above 0 degrees Celsius will facilitate the melting of ice.

3. **Effect of Pressure**:
- The volume of ice is greater than that of water. According to Le Chatelier's principle, if the volume decreases (as ice melts into water), increasing the pressure will favor the melting process. Thus, high pressure can also assist in melting ice.

4. **Evaluating the Options**:
- **Option 1**: High pressure and temperature below 0 degrees Celsius - This will not help in melting ice since the temperature is too low.
- **Option 2**: High pressure and temperature above 0 degrees Celsius - This is a favorable condition for melting ice.
- **Option 3**: Low pressure and temperature above 0 degrees Celsius - While the temperature is favorable, low pressure may not be as effective as high pressure.
- **Option 4**: Low pressure and temperature below 0 degrees Celsius - This condition is not favorable for melting ice.

5. **Conclusion**:
- The best option that helps in melting ice is **Option 2: High pressure and temperature above 0 degrees Celsius**.

### Final Answer:
**The correct option is: High pressure and temperature above 0 degrees Celsius (Option 2).**

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