Chapter-4 Chemical Kinetics MCQs
Q 41.: According to intermediate compound formation theory or transition state theory, the reaction can be shown passing through which of the following steps ?
(A) Reactant → Activated complex product → Activated complex → Products
(B) Reactant → Product
(C) Reactant → Activated complex → Products
(D) Reactant → Products → Activated complex
Option – C
Q 42.: According to molecular collision theory, the reaction is subjected to __________
(A) Number of collisions between reactants and activated complex
(B) Number of effective molecular collisions of reactants
(C) The collision rate between reactants and product molecules
(D) Number of molecular collisions of reactant
Option – B
Q 43.: Half-life of a reaction is found to be inversely proportional to the cube of initial concentration, The order of reaction is
(A) First
(B) Second
(C) Third
(D) Fourth
Option – D
Q 44.: In an attempt to compare the half-lives of two radioactive element ‘A’ and ‘B’, a scientist set aside 400 gm of each. After 3 months, the scientist found 25 gm of ‘A’ and 200 gm of ‘B’. Which one of the following statements is correct ?
(A) Half-life of ‘B’ is twice that of ‘A’
(B) Half-life of ‘B’ is four times that of ‘A’
(C) Half-life of ‘A’ is twice that of ‘B’
(D) Half-life of ‘A’ is four times that of ‘B’
Option – B
Q 45.: Which scientist explained the effect of temperature on the reaction rate constant ?
(A) Faraday
(B) Waag and Guldberg
(C) Le-Chatelier
(D) Arrhenius
Option – D