Q12(b). Quantum yield from an actinometer

In a photochemical reaction, the following data were obtained using an actinometer: number of photons absorbed per second =2.0×10¹⁶; rate of formation of product molecules =3.6×10¹⁶ molecules s⁻¹. (i) Calculate the quantum yield of the reaction. (ii) What does the obtained value indicate about the nature of the mechanism? (iii) Name one reaction from the syllabus where such behaviour is observed. Explain your choice.