A difference between chemical and physical change is that in a chemical change

The main difference between a chemical change and a physical change is that in a chemical change, a new substance is formed. During a chemical change, the atoms or molecules of the original substance rearrange themselves to form a new substance with different properties. In contrast, a physical change involves a change in the physical state or appearance of a substance, but the chemical composition of the substance remains the same. For example, melting ice is a physical change because the solid water (ice) is converted into liquid water, but the chemical composition of the water remains the same. Therefore, the correct answer to the question is that in a chemical change, a new substance is formed. The other options may be associated with chemical changes as well, but they are not defining characteristics of chemical changes.