5.Which of the following indicates that an exothermic reaction has taken place?
A. change in color
B. release of heat and/or light energy
C. cooling of the surroundings
D. Absorption of heat by the reaction

6.Which on the following indicates that an endothermic reaction has taken place?
A. cooling of the surrounding
B. release of the heat and light energy
C. a loud explosion
D. a change in color

7. What type of reaction does the generalized equation A + B -AB represent?
A. Decomposition
B. Double Displacement
C. Single displacement
D. synthesis

8. Consider the equation CO2 - C + O2. what type of reaction is this?
A. Synthesis
B. Decomposition
C. Single Displacement
D. double displacement