Question

If ‘I’ is the intensity of absorbed light and ‘C’ is the
concentration of AB for the photochemical process,
AB + hv → AB*, the rate of formation of AB* is directly
proportional to
(a) C (b) I (c) I² (d) C.I

Answer 1

Answer:

c is the correct option...

Answer 2

The rate of formation of AB* is directly proportional to - (b) I

The reaction depicted in question is photochemical reaction. In such type of reactions, light of specific wavelength initiates the reaction usually by converting atoms or molecules into free radicals.

For photochemical reactions, there exists law of photochemical equivalence. The law states that each photon is absorbed by one reactant or substrate.

The characteristic of photochemical reaction is that rate of such type of reaction depends upon intensity of radiation absorbed. Thus option b is correct answer.