200 ml of a sample of water required 2 94 mg of K Cr O eq wt

Last updated: 6/30/2023

200 ml of a sample of water required 2 94 mg of K Cr O eq wt 49 in the presence of H SO for the oxidation of dissolved organic matter in it The COD of the water sample is a 2 4 ppm b 4 8 ppm c 9 6 ppm d 16 ppm