Question

Which statement describes all chemical changes, but not all physical changes?

A.) Bubbles are produced

B.) A new substance forms

C.) Phase changes occur

D.) A color change occurs

Answer 1

B. a new substance forms.

Answer 2

Answer: Option (B) is the correct answer.

Step-by-step explanation:

A chemical change is a change which occurs due to change in chemical composition of a substance.

For example, churning of milk into curd is a chemical change because chemical composition of milk changes as it turns into curd.

Thus, we can conclude that out of the given options the statement a new substance forms describes all chemical changes, but not all physical changes.