Is this statement true or false? a change in temperature is always an indicator of a chemical reaction. a. true b. false 2. is this statement true or false? a color change is an indicator of a chemical reaction. a. true b. false 3. is this statement true or false? a change in size is an indicator of a chemical reaction. a. true b. false 4. is this statement true or false? the release of gas is an indicator of a chemical reaction. a. true b. false 5. is this statement true or false? the formation of a precipitate is an indicator of a chemical reaction. a. true b. false 6. is this statement true or false? a change in state is an indicator of a chemical reaction. a. true b. false