Question

The connection between the pace of a chemical reaction and the concentration of the species involved is referred to as the order of reaction. The rate expression (or rate equation) of the reaction in question must be acquired before the reaction order can be determined. The number of species whose concentration directly influences the pace of reaction is represented by reaction order.

Answer 1

A zero-order reaction is a chemical reaction in which the rate does not change as the concentration of the reactants changes. As a result, the rate constant of these reactions is always equal to that of the particular reactions (since the rate of these reactions is proportional to the zero power of reactant concentration).

Complete answer:
A first-order reaction is one in which the rate of the reaction is directly proportional to the concentration of only one ingredient. In other terms, a first-order reaction is a chemical reaction whose pace is determined by changes in just one of the reactants' concentration. These responses are in the same sequence.

Zero -order reaction	First-order reaction
The pace of chemical reactions is independent of the concentration of reactants in zero-order kinetics.	In first-order kinetics, the rate of chemical reactions is determined by one of the reactant concentrations.
Between the reactant concentration and time, a linear graph is produced.	Between the reactant concentration and time, a curved graph is formed.
The rate constant is the rate law.	The product of the rate constant and the reactant concentration is the rate law.

Note: The stoichiometric coefficients corresponding to each species in the balanced reaction have no bearing on the reaction sequence. A chemical reaction's reaction sequence is always determined by reactant concentrations rather than product concentrations. The order of reaction can be expressed as an integer or as a fraction. It is even possible for it to have a value of zero.