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Reaction rates are affected by concentration, collision geometry, and the presence of a catalyst. Which of the following statements is FALSE concerning these factors? Increasing the concentration of reacting particles increases the chance for collisions. A catalyst lowers the activation energy requirement. A reaction occurs each time particles of the reactants collide. The slowest reaction involved in a reaction mechanism determines the rate of overall reaction.

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The first one is FALSE

Answer:  A reaction occurs each time particles of the reactants collide.

Explanation:

  • A chemical reaction is a process in which the reactants combine together to form a product accompanied by breakage of old bonds and formation of new bonds.

  • It is not necessary that the reaction will occur each time the particles of reactants collide.

  • For a reaction to occur due to a collision, it is necessary for the particles to collide with enough energy such that the old bonds get broken and they collide in a proper orientation.

  • If the above conditions are not met, a chemical reaction will not occur even after a collision.

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