Study the two photochemical reactions and answer the questions given below: For the overall reaction between A and B to yield C and D two mechanisms are proposed:
(I) `A+B rarr AB* rarr C+D, k_(1)=1xx10^(-5)M^(-1)s^(-1)`
(II) `A rarr A* rarr E, k_(1)=1xx10^(-4)M^(-1)s^(-1)`
`E+B rarr C+D, k_(2)=1xx10^(10)M^(-1) s^(-1)` (species with * are short-lived)
Rate according to mechanism II when concentration of each reactant is 1 M will be:

Options

A. `1xx10^(-4) M s^(-1)`
B. `1xx10^(10)M s^(-1)`
C. `1xx10^(-6)M s^(-1)`
D. `1xx10^(-10) M s^(-1)`

Answer

A