Which of the following statements regarding kinetic molecular theory and reactio

Question

Which of the following statements regarding kinetic molecular theory and reaction rates is NOT correct? The rate constant for a reaction is dependent on temperature and collision effectiveness. As temperature increases, more molecules collide and the probability that they have the correct orientation increases. The energy of a molecular collision must be great enough to overcome the activation energy of the reaction. The fraction of molecules with sufficient energy to react typically increases with temperature. At a given temperature, the difference in free energy between the reactants and products determines reaction rate. Which of the following statements regarding collision energy and orientation is NOT correct? The probability that every molecular collision has the correct orientation is generally less than 1. All reactions show a large dependence on the orientation of the atoms or molecules involved in collisions. The frequency factor. A. includes factors to account for collision frequency and to correct for collision effectiveness. More collisions increase the probability that reactants will have the required orientation to react. Frequency factors can have a wide range of values, depending on the reaction mechanism. Which of the following statements regarding transition states and activated complexes is NOT correct? An activated complex is formed by reacting species that have enough potential energy to react with each other. Formation of the activated complex is usually endothermic. An activated complex is an unstable short-lived intermediate between reactants and products. Every activated complex formed goes on to generate the products of the reaction There can be more than .me transition state during the course of a multistep reaction.

Explanation / Answer

47) Statement b) seems to be incorrect because as temperature rises the molecules might get excited more
   than sufficient and this may lead to improper orientation.
48) Statement c) is not correct, Pre-exponential factor doesn't involve such factors.
49) Statement a) is incorrect , the molecules have enough kinetic energy i.e) the total K.E must be greater or equal
   to activation energy for an activated complex to form.

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