TS EAMCET · Chemistry · Environmental Chemistry
The reagent used in the determination of the chemical oxygen demand (COD) of water sample is
- A potassium permanganate
- B sulphuric acid
- C acidified potassium dichromate
- D potassium dichromate
Answer & Solution
Correct Answer
(C) acidified potassium dichromate
Step-by-step Solution
Detailed explanation
The organic matter present in the water sample is oxidised by potassium dichromate in the presence of \(\mathrm{H}_2 \mathrm{SO}_4\) to produce \(\mathrm{CO}_2\) and \(\mathrm{H}_2 \mathrm{O}\). This helps in determination of COD of water sample. So, the correct option is…
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