Answer
See explanation
Work Step by Step
a) The phenol coefficient is a value that allows determining the effectiveness of a disinfectant in contrast to phenol.
b) It will be a good disinfectant only at high concentrations since its disinfectant activity is observed for the lowest dilutions (1:50 and 1:60).
At 1:70 and 1:80 dilutions it is no longer effective, while phenol remains effective even at 1:100 dilutions.
