Which one of the following statements is correct ?

Options

A. In collision theory `e^(-E_(A)//AT)` corresponds to the fraction of molecules that have energy equal or greater than `E_(a)`
B. The number of collision of reacting molecules per second per unit volume of the reaction mixture is activated complex
C. Molecularity is the number of molecules involved in a complex reaction
D. A catalyst catalyses the non- spontaneous reaction

Answer

A

Explanation

In collision theory `e^(-E_(a) //RT)` corresponds to the fraction of molecules that have energy equal to or greater than `E_(a)` (activatio - energy ) is the correct statement because it is in accordance with Arrhenius theory
(b) The number of collision of the reacting
molecules per second per unit volume of the reaction mixture is activated complex is not a correct statement as activated complexes are formed during teh reaction which finally gives the product .
(c ) Molecularity is the number of molecules involved in a complex reaction . This is also not correct as molecularity is defined as.
(d) A catalyst catalyses the non- spontaneous reaction . This is also not correct as a catalyst can catalyse theh spontaneous as well as non- spontaneous reactions.
Hence option (a ) is the correct answer .