Question

Which of the following observations is usually not evidence of a chemical change ?
A. Change of shape
B . Formation of a precipitate
C.Giving off of a gas
D.giving off heat and/or light

Answer 1

Answer:

D

Explanation:

Have a nice day

Answer 2

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