If heat a supplied to a solid, its temperature

Options

A. must increase
B. may increase
C. may remain constant
D. may decrease

Explanation

To solve the question, "If heat is supplied to a solid, its temperature will:", we need to analyze the effects of heat on a solid material.

### Step-by-Step Solution:

1. **Understanding Heat Transfer**: When heat is supplied to a solid, it can lead to changes in temperature depending on the state of the solid and the amount of heat supplied.

2. **Temperature Increase**:
- In many cases, when heat is added to a solid, the temperature of the solid will increase. This is because the heat energy increases the kinetic energy of the atoms or molecules in the solid, causing them to vibrate more vigorously.
- This increase in vibration leads to an increase in temperature.

3. **Phase Change**:
- However, if the solid reaches its melting point and begins to change phase (for example, from solid to liquid), the heat supplied is used for breaking the intermolecular bonds rather than increasing the temperature.
- During this phase change, the temperature remains constant even though heat is being added.

4. **Conclusion**:
- Therefore, the correct options are that the temperature "may increase" (when heat increases atomic vibrations) and "may remain constant" (when the solid undergoes a phase change).

### Final Answer:
The correct options are:
- Temperature may increase.
- Temperature may remain constant.