Question

which of the following statements is false? a) larger particles move faster than smaller ones and thus collide frequently and more forcefully. b) chemical reactions progress at a faster rate when the reacting present in higher numbers. c) catalysts increase the rate of chemical reactions, sometimes w undergoing reversible changes in shape. d) chemical reactions proceed more quickly at higher temperature question 14 (1.7 points) forming glycogen as energy storage in the liver is an example of

Explanation:

• Option A: Larger particles have more mass and, according to kinetic - molecular theory, move slower than smaller particles at the same temperature, so they collide less frequently and less forcefully. This statement is false.
• Option B: The rate of a chemical reaction is proportional to the concentration of reactants. Higher numbers of reacting particles mean more collisions and a faster reaction rate, so this is true.
• Option C: Catalysts work by providing an alternative reaction pathway with a lower activation energy and often undergo reversible changes in shape during the reaction process, so this is true.
• Option D: Increasing temperature increases the kinetic energy of particles, leading to more frequent and energetic collisions, thus speeding up chemical reactions, so this is true.

Answer:

A. Larger particles move faster than smaller ones and thus collide frequently and more forcefully.