The following mechanism has been proposed for the reaction of NO with Br2 to form NOBr.
NO(g) + Br2(g) ⇋ NOBr2(g)
NOBr2(g) + NO(g) → 2NOBr(g)
If the second step is the rate determining step, the order of the reaction with respect to NO(g) is
(a) 1
(b) 0
(c) 3
(d) 2.
