Which observation most likely indicates that only a chemical change has taken place?(1 point)

Question

Responses

A reaction occurs.

The change cannot be reversed.

The shape changes.

States of matter changes.

Answer 1

The observation that most likely indicates that only a chemical change has taken place is: The change cannot be reversed.

Chemical changes typically result in new substances being formed, and many of these changes are not easily reversible. The other options can occur in physical changes as well.