You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is Compound used for water purification: and explain in detail?
Ans: c (Chlorine) Ref:Park, 19 ed,p. 575Xenodiagnosis is related to -trench feverEpidemiological tetrad is related to-scrub typhusChlorine:Contact period--1 hourNo effect on spores/ protozoal cyst needs superchlorinationEffective against all virus except polio & hepatitis ABleaching powder:Iodine:* Chemically CaOC12Emergency disinfection of water* Available chlorine is 33%Contact time 20-30 min* Unstable compoundEffective over wide range of pH values* Free residual chlorine needed for effective chlorination is 0.5 mg/1. at the end of one hour contact period.Persist longer than chlorine