COMEDK 2007 MCQ Answer 79
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The correct answer is B
Chlorination status of water is confirmed by carrying out Ortho Toluidine test where in 1 ml sample of drinking water a drop of Ortho Toluidine reagent is added and after 10 seconds the yellowish coloration is compared with the standard colored plates of choloscope for the presence of free chlorine.
Chlorination status of water is confirmed by carrying out Ortho Toluidine test where in 1 ml sample of drinking water a drop of Ortho Toluidine reagent is added and after 10 seconds the yellowish coloration is compared with the standard colored plates of choloscope for the presence of free chlorine.
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