Classify the changes involved In the following processes as physical or chemical changes :
Burning of Coal

Explanation

**Step-by-Step Solution:**

1. **Understanding the Process**: The process in question is the burning of coal. To classify this change, we need to analyze what happens during the burning process.

2. **Definition of Physical Change**: A physical change is one where the substance involved can return to its original state. The composition of the substance remains the same, and it is usually reversible. Examples include melting, freezing, and dissolving.

3. **Definition of Chemical Change**: A chemical change involves a transformation where the original substance changes into one or more new substances. This process is usually irreversible, and new products are formed. Examples include rusting, burning, and digestion.

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