Answer:
Greater than 1
Step-by-step explanation:
Phenol co-efficient is a measure of germicidal efficiency of any chemical disinfectant against a given set of microbes under laboratory conditions as compared to the phenol germicidal efficiency.
Any disinfectant which has a higher efficiency as compared to phenol, has a phenol coefficient greater than one. While on the other hand any disinfectant having a lower efficiency as compared to phenol, has a phenol coefficient less than one. A disinfectant having a phenol coefficient of one is as efficient as phenol.
Hence, If a chemical disinfectant is more effective than phenol, then its phenol coefficient would be ___greater_____ than 1.0.