What is a sign that a chemical change has taken place?

Question

A) A substance melts into a liquid
B) A new substance is formed with different properties
C) A substance is crushed into a powder
D) A substance dissolves in water

Answer 1

B) A new substance is formed with different properties

This is a sign that a chemical change has taken place, as it indicates that the original substances have reacted and transformed into new substances. The other options (A, C, and D) describe physical changes rather than chemical changes.