Give one example in each case
Change which occurs on heating but can be reversed.

Explanation

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks for an example of a change that occurs when a substance is heated and can be reversed. This means we need to find a process that can return to its original state after heating.

2. **Identifying Reversible Changes**: A reversible change is one where the original substance can be recovered after the change has occurred.

3. **Example Selection**: One common example of a reversible change that occurs on heating is the process of dissolving salt in water.

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