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A sample of domestic sewage is digested with silver sulphate, sulphuric acid, potassium dichromate and mercuric sulphate in chemical oxygen demand (COD) test. The digested sample is then titrated with standard ferrous ammonium sulphate (FAS) to determine the un-reacted amount of
(A) mercuric sulphate
(B) potassium dichromate
(C) silver sulphate
(D) sulphuric acid


Question ID - 155769 | Toppr Answer

A sample of domestic sewage is digested with silver sulphate, sulphuric acid, potassium dichromate and mercuric sulphate in chemical oxygen demand (COD) test. The digested sample is then titrated with standard ferrous ammonium sulphate (FAS) to determine the un-reacted amount of
(A) mercuric sulphate
(B) potassium dichromate
(C) silver sulphate
(D) sulphuric acid

1 Answer - 5876 Votes

3537

Answer Key : (B) -

potassium dichromate



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