An important parameter of a photochemical reaction is the quantum efficiency or quantum yield `(phi)` which is defined as
`phi=("moles of the substance reaction")/("moles of photons absorbed")`
Absorption of UV radiation decompose acetone according to the reaction
`(CH_(3))_(2)COoverset(hv)(rarr)C_(2)H_(6)+CO`
The quantum yield of a reaction at `lambda=330nm` is 0.4 . A sample of acetone absorbs monochromatic radiation at `lambda330mn` at the rate of `7.2xx10^(-3)Js^(-1)` (given : `N_(A)=6xx10^(23), h=6.6xx10^(-34)` in S.I unit). The rate of formation of `CO(mol//s)` is :
a) `2xx10^(-8)`
b) `8xx10^(-8)`
c) `8xx10^(-9)`
d) none of these

Options

A. `2xx10^(-8)`
B. `8xx10^(-8)`
C. `8xx10^(-9)`
D. none of these

Answer

C