Question

If the chemical properties of a substance remain unchanged and the appearance or shape of a substance changes it is called a
A) chemical change B) physical change C) slow change D) periodic change

Answer 1

Option A is correct as if the chemical properties of a substance remain unchanged and the appearance or shape of a substance changes it is called a physical change.

• A physical change is a reversible change and can be defined as a change that is incapable of producing a new substance.
• This kind of change only affects the physical properties of a material, for example shape, size, etc.
• Some of the examples of physical changes are boiling of water, stretching of elastic, etc.

Answer 2

Answer:

Chemical changes is the answer of this