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
JEE Main 2006 · Annual, Paper 1 · Q464