Which indicator most likely suggests that a chemical change is taking place? 1)change in size 2)change of color 3)change of state 4)change in shape

The correct answer is 2) change of color

Explanation:

A chemical change occurs when a new substance is formed or the original substance changes its identity and composition due to a chemical reaction. This is the opposite of a physical change that modifies only physical properties such as state or shape. Moreover, a chemical reaction can be identified because if often leads to a change in color, odor, the formation of bubbles or temperature change. This implies the only one that suggests a chemical change is a change of color because this occurs if the composition of a substance or substances change.

a plasma is a warm ionized gasoline consisting of approximately equal numbers of definitely charged ions and negatively charged electrons. the characteristics of plasmas are notably unique from the ones of ordinary neutral gases in order that plasmas are considered a awesome "fourth kingdom of remember."

if you mean hydrogen and oxygen then water is the product