Respuesta :
Among the following observations which is usually not evidence of a chemical change is change of a shape.
What is chemical change?
Chemical changes will occur when the composition of the substance is changes internally or converted into any new product.
- Change of shape is an example of physical change as it is not essential if shape changes then chemical properties also changes.
- Formation of a precipitate is a chemical process because in this process any new substance is formed.
- Giving off a gas is also a chemical process as in this change an extra product is released.
- Giving off heat or light is also a chemical change because this heat will be calculated as a energy.
So, change of shape is not a chemical change.
To know more about chemical change, visit the below link:
https://brainly.com/question/26018275