The following mechanism has been proposed for the reaction of NO with Br₂ to form NOBr:
NO(g) + Br₂ (g) $$\leftrightharpoons$$ NOBr₂ (g)
NOBr₂ (g) + NO (g) $$\to$$ 2NOBr (g)
If the second step is the rate determining step, the order of the reaction with respect to NO(g) is

Hydrogen bomb is based on the principle of

A reaction involving two different reactants can never be

The photon of hard gamma radiation knocks a proton out of $${}_{12}^{24}Mg$$ nucleus to form