Question

Which of the following is a sign that a chemical change is taking place?

Select one:

A.
a substance melting at high heat

B.
an object breaking into pieces

C.
a blue solid dissolving in water and changing the water to a blue colour

D.
an offensive odor emitting after two liquids are mixed

Answer 1

C. a blue solid dissolving in a water and changing the water to a blue colour

Step-by-step explanation:

Answer 2

B. an object breaking into pieces