Multiple choice questions relating to chemical reactions 1. The rate of a chemic

Question

Multiple choice questions relating to chemical reactions

1. The rate of a chemical reaction may be increased by a. increasing the frequency of molecular collisions. b. increasing the energy of molecular collisions. c. lowering the activation energy of (he reaction. d. all of the above 2. Increasing the temperature of a reaction a. increases the frequency of molecular collisions. b. increases the energy of molecular collisions. e. increases both the frequency and energy of molecular collisions. d. lowers the activation energy of the reaction. 3. Increasing the concentration of a reactant a. increases the frequency of molecular collisions. b. increases the energy of molecular collisions. e. increases both the frequency and energy of molecular collisions. d. lowers the activation energy of the reaction. 4. Increasing the surface area of a solid reactant a. increases the frequency of molecular collisions. b. increases the energy of molecular collisions. e. increases both the frequency and energy of molecular collisions. d. lowers the activation energy of the reaction. 5. The presence of a reaction catalyst a. increases the frequency of molecular collisions. b. increases the energy of molecular collisions. c. increases both the frequency and energy of molecular collisions. d. lowers the activation energy of the reaction. 6. Which has a greater surface area? a. 1 kg of wood sawdust b. a piece of solid wood with a mass of 1 kg

Explanation / Answer

1) d

2) d

3) b

4) a

5) d

6) a

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