Question

Which of the following is an indication that a substance has undergone a chemical change?

No new product has been formed.

The color of the substance has not changed.

The original constitute has not changed.

The molecular structure has changed.

Answer 1

D.

The molecular structure has changed.

Step-by-step explanation:

I got it right on Plato.

Answer 2

The correct option is : THE MOLECULAR STRUCTURE HAS CHANGED.
A chemical change is a type of change in which a new product is formed as a result of reacting with another substance. When a chemical change occur, the molecular structure of the reactant will be altered and an entirely new product will be formed.
All the other options given are examples of physical change.