Question

what is a first order reaction​

Answer 1

Answer:

a chemical reaction in which the rate of reaction is directly proportional to the concentration of the reacting substance — compare order of a reaction

Answer 2

$\huge\frak\red{AnSwer}$

Definition of first-order reaction

: a chemical reaction in which the rate of reaction is directly proportional to the concentration of the reacting substance — compare order of a reaction.