Question

Which of the following is the expression of Chicks law?

(a) Dy/Dt = k (N – y)

(b) Dy/Dt = k/(N – y)

(c) Dy/Dt = k (N + y)

(d) Dy/Dt = k (N * y)

This question was addressed to me in an interview for job.

The query is from Kinetics of Chemical Disinfection topic in chapter Properties of Disinfection of Environmental Engineering

Answer 1

Correct choice is (a) Dy/Dt = k (N – y)

The explanation is: The expression of Chicks law is given by Dy/Dt = k (N – y) Where, N is the number of organisms initially present, ‘y’ is the number of organisms remaining after time t and k is the coefficient of proportionality.