State whether the following statements are true or false: The softening of iron on heating to red hot stage is a reversible change.

Answer

To determine whether the statement "The softening of iron on heating to red hot stage is a reversible change" is true or false, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Concept of Reversible Change**:
- A reversible change is a change that can be undone or reversed, allowing the original substance to be recovered.

2. **Heating Iron**:
- When iron is heated to a red hot stage, it becomes soft. At this temperature, the iron's physical properties change, making it malleable and easier to shape.

3. **Cooling the Softened Iron**:
- If the softened iron is allowed to cool down, it will return to its original hard state. This means that the change from hard iron to soft iron can be reversed.

4. **Conclusion**:
- Since we can heat the iron to make it soft and then cool it to regain its original hardness, we can conclude that the softening of iron on heating is indeed a reversible change.

5. **Final Answer**:
- Therefore, the statement "The softening of iron on heating to red hot stage is a reversible change" is **True**.