Rideal-Walker coefficient is related with ?

Ans. is 'a' i.e., Disinfecting power Traditional testing of disinfectants Two traditional tests for determining the efficiency of disinfectants are :? 1) Rideal-Walker test : Phenol is taken as the standard with unit as phenol coefficient (pheno1=1) 2) Chick-Main test : The disinfectant acts in the presence of organic matter (dried yeast or feces).