Q. Sunlight is a ________ method of disinfection.

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Q. Which of the following is a chemical method of disinfection?

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Q. The pathogenic bacteria do not last long at a pH ______

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Q. Which minor method of disinfection is effective in complete sterilization of water?

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Q. What is the dose of lime required in the excess lime treatment?

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Q. At what pH, the E-Coli bacteria will die in the water?

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Q. The depth of water while using ultra violet ray treatment for disinfection should be ____

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Q. Which method of disinfection is mainly used in rural areas?

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Q. The dose of KMnO₄ required for disinfection of water is _______ ppm.

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Q. Addition of KMnO₄ to water imparts _____ color.

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Q. Which of the following is termed as free available chlorine?

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Q. At what pH, chlorine exists as molecular chlorine?

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Q. When the pH is between 5 and 10, the chlorine in the water acts as ______

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Q. At what pH, chlorine in water acts as only hypochlorite ions?

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Q. The hypochlorous acid is ______ times effective as hypochorite ions.

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Q. Chlorine which gets consumed in the oxidation of impurities before disinfection is ______________

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Q. The chlorine, which serves as a disinfectant is ___________

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Q. The permissible limit of free residual chlorine is ___________

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Q. What is the chemical formula of bleaching powder?

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Q. Bleaching powder contains ______ of available chlorine.

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