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Possible Viva-Voce Query 1 Potassium dichromate is considered as the best? 2 Mercury sulphate is added to reduce the interference of? 3 Silver sulphate is added as? 4 Ferroin indicator is? 5 After refluxing, _________________ solution is titrated against FAS. 6 H2SO4 is added to FAS solution for? 7 The product formed after COD analysis is? 8 In industrial waste water, COD value is about _____________ BOD value. 9 Sulphuric acid is added as? 10 A blank solution is? Department of Civil Engineering – SNS College of Engineering S.No 5 3
