Question

What is the graphical behaviour of a first order reaction on plotting rate of reaction against time

Answer 1

For a first-order reaction, the rate at any time is given by

Rate = k[A]_t​

and from the integrated rate equation

[A]_t​ = [A]₀​e^−kt

Thus

Rate = k[A]₀​e^−kt

This shows that the rate decreases exponentially with time.