Statement-1: Steam burns are more painful than that caused by boiling water at same temperature.
Statement-2: Internal energy of steam at `100^(@)C` is greater than that of water at `100^(@)C`.

Options

A. a. Statement-1 is true, statement-2 is true, statement-2 is a correct explanation for statement-1
B. b. Statement-1 is true, statement-2 is true, statement-2 is not a correct explanation for statement-1
C. c. Statement-1 is true, statement-2 is false
D. d. Statement-1 is false, statement-2 is true

Answer

To solve the question, we need to analyze both statements and understand the concepts of latent heat and internal energy.

### Step-by-Step Solution:

1. **Understanding the Statements**:
- **Statement 1**: Steam burns are more painful than burns caused by boiling water at the same temperature.
- **Statement 2**: The internal energy of steam at 100°C is greater than that of water at 100°C.

2. **Analyzing Statement 1**:
- When steam comes into contact with skin, it can cause burns that are more severe than those caused by boiling water. This is because steam contains additional energy in the form of latent heat.

3. **Latent Heat Concept**:
- Latent heat is the energy required to change a substance from one phase to another at constant temperature. For water to become steam, it must absorb heat (latent heat of vaporization). This means that steam has more energy than water at the same temperature.

4. **Energy Comparison**:
- Let’s denote the heat content of boiling water at 100°C as Q. The heat content of steam at the same temperature will be Q + L, where L is the latent heat of vaporization.
- Therefore, the energy in steam (Q + L) is greater than the energy in boiling water (Q).

5. **Conclusion on Statement 1**:
- Since steam has more energy due to the additional latent heat, it can cause more severe burns upon contact with skin. Thus, Statement 1 is true.

6. **Analyzing Statement 2**:
- The internal energy of a substance is related to its temperature and phase. At 100°C, steam (gas phase) has a higher internal energy compared to water (liquid phase) because of the latent heat that has been absorbed during the phase change from liquid to gas.

7. **Conclusion on Statement 2**:
- Since the internal energy of steam at 100°C is indeed greater than that of water at the same temperature, Statement 2 is also true.

8. **Relationship Between Statements**:
- Statement 2 provides a correct explanation for Statement 1. The additional energy in steam (latent heat) is what makes steam burns more painful.

### Final Conclusion:
Both statements are true, and Statement 2 is the correct explanation for Statement 1.