Which of the following statements about chemical kinetics is FALSE? 1. A catalys

Question

Which of the following statements about chemical kinetics is FALSE?

1. A catalyst increases the value of a rate constant k by lowering the activation energy Ea.

2. Reactant molecules must have the correct collision geometry in order to start bond-breaking and/or bond-making.

3. Higher reaction temperatures generally increase the rate of a reaction, all else being equal.

4. Reactant molecules must have a minimum kinetic energy upon collision to start bond-breaking and/or bond-making.

5. One-step trimolecular reactions are more statistically favorable than one-step bimolecular reactions.

Explanation / Answer

Statement 3 and 5 are incorrect

3 is incorrect because rate of reaction depends on whether the reaction is endothermic or exothermic and therfore increasing the temperature may or may not increase the rate of reaction

5 is false beacuse one step trimolecular reaction is less statistically favorable because there is less probabiity that three reactant molecules are available at same place and same time with correct geomertry

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