Consider this reaction :
`2NO_(2)(g)+O_(3)(g)rarrN_(2)O_(5)(g)+O_(2)(g)`
The reaction of nitrogen diozidd and ozone represented is first order in `NO_(2)(g) and "i n" O_(3)(g)`. Which of these possible reaction mechanisms is consistent with the rate law?
Mechanism I: `NO_(2)(g)+O_(3)rarrNO_(3)(g)+O_(2)("slow ")`
`NO_(3)(g)+NO_(2)(g) rarrN_(2)O_(5)(g)" "("fast")`
Mechanism II `O_(3)(g)hArrO_(2)(g)+[O]" "("fast")`
`NO_(3)(g)+[O](g)rarrNO_(3)(g)" "("slow")`
`NO_(3)(g)+NO_(2)(g)rarrN_(2)O_(5)(g)" " ("fast")`

Options

A. Only I
B. Only II
C. Both I and II
D. Neither I nor II

Answer

C