Match the entries of column I with appropriate entries of column II and choose the correct option out of the four options given.
| Column I | Column II |
| (i) Catalyst alters the rate of reaction | (a) cannot be fraction or zero |
| (ii) Molecularity | (b) by lowering the activation energy |
| (iii) Energetically favourable reactions are sometimes slow | (c) refers to the fraction of molecules with energy equal to or greater than activation energy |
| (iv) e-Ea/RT | (d) proper orientation is not there always |
Answer & explanation
Correct answer: option 1
(i) Catalyst alters the rate of reaction by lowering the activation energy. It increases the rate of reaction.
(ii) Molecularity of a reaction cannot be fraction or zero. It can have value 1, 2 and 3.
(iii) Energetically favourable reactions are sometimes slow because there is not proper orientation always during collision of molecules.
(iv) e-Ea/RT : Arrhenius equation refers to the fraction of molecules with energy equal to or greater than activation energy.