What is Zero Order reaction ?

Explanation

Zero order reaction : The rate of reaction is independent of the concentration of reactants.
For the reaction `Rto p,Rate=-(d[R])/(dt)=k[R]^(0)|{:("[R]- Concentration of reactant"),("K- Zero order rate constant"):}`
1) Decomposition of `NH_(3)` on hot Pt surface`: 2NH_(3)(g) overset(1130K)underset("Pt catalyst")to N_(2)(g) +3H_(2)(g)`
2) Decomposition of HI on Gold surface is a zero order reaction `2HI overset(Au)toH_(2)+ I_(2)`