Question

In phenol coefficient test, higher coefficient value indicates

• A. The increased efficiency of the disinfectant
• B. The decreased efficiency of the disinfectant
• C. The disinfectant does not affect the bacterial growth
• D. None of the above

Answer 1

The correct option is A The increased efficiency of the disinfectant

Phenol coefficient is a number relating the microbial killing efficiency of a compound to phenol. It is calculated by dividing the concentration of the test compound at which it kills the test organism in 10 minutes by the concentration of phenol that kills the organism under the same conditions. A higher coefficient value indicates an increased efficiency of the disinfectant. Thus the correct answer is option A.