Write differential rate expression of following reaction and give its order of reaction :

$2 HI \rightarrow H _{2}+ I _{2}$

$2 NO _{( g )}+ O _{2( g )} \rightarrow 2 NO _{2( g )}$

The rate law of the reaction $2{N_2}{O_5} \to 4N{O_2} + {O_2}$ is

Order of a reaction can have

The reaction $2 NO + Br _2 \rightarrow 2 NOBr$

takes places through the mechanism given below :

$NO + Br _2 \Leftrightarrow NOBr _2 \text { (fast) }$

$NOBr _2+ NO \rightarrow 2 NOBr \text { (slow) }$

The overall order of the reaction is $.....$.

Select the correct statement

Assuming the reaction

$2NO(g) + Cl_2(g) \longrightarrow 2NOCl(g)$

occurs in a single elementary step, we can say that