What are the symptoms which show that the change is chemical?

Answer 1

1.Precipitation forms

2.Bubbles of gas appear

3.Colour changes occur

4.Temperature occurs

5.Change in volume occurs

Answer 2

Some symptoms that indicate a chemical change include the formation of gas, a change in color, the release of heat or light, and the production of a precipitate. These changes are typically not easily reversed, unlike physical changes.