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For changing the concentration of disinfectant, the disinfecting efficiency is expressed by ____________

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For changing  the concentration of disinfectant, the disinfecting efficiency is expressed by ____________

(a) C n *t p = Constant

(b) C n/ t p = Constant

(c) C q * Np = Constant

(d) C q / Np = Constant

The question was asked in exam.

The question is from Kinetics of Chemical Disinfection topic in chapter Properties of Disinfection of Environmental Engineering

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Right option is (a) C n *t p = Constant

Easiest explanation: The disinfecting efficiency is expressed by C n *t p = Constant where, C is the concentration of disinfectant, t p is the time required to kill the organism and n is the coefficient of dilution.

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