The following mechanism has been proposed for the reaction of NO and Br2 to form NOBr

NO(g) + Br2(g)  NOBr2(g)

NOBr2 (g) + NO(g) → 2NOBr(g)

If the second step is rate determining step, the order of the reaction with respect to NO(g) is

  1. 0                             B.1                            C. 3                            D.            2