Question

whenever a chemical change occurs , we can say that a chemical reaction has taken place

Answer 1

Answer:

YES, your statement is correct

Explanation:

Answer 2

Answer:

There are four signs that a chemical reaction has occurred: a change in color, a change in temperature, formation of a gas or formation of a precipitate. A precipitate is a solid that forms when two liquid solutions are mixed. As matter changes in a chemical reaction, it can either absorb or release energy.