Question

A substance undergoes a change. Which of the following indicates that the change was a chemical change?

The substance froze
The substance changed size
The substanced changed shape
New molecules formed

Answer 1

new molecules would form.
the other three are examples of a physical change

Answer 2

Answer;

-New molecules formed

Step-by-step explanation;

-Chemical changes are type of changes that occurs when substances combine to form a new substance. They occur as a result of chemical reaction. During a chemical reactions, the atoms within a substance are rearranged into different combinations.

-Examples of chemical changes include; rusting of iron, heating sugar to form caramel, baking a cake, digesting food among others.