100 ml of sample of water requires 3.92 mg of K_2 Cr_2O_3 in presence of H_2SO_4 for the oxidation of dissolved organic matter present in it. The COD of the water sample in ppm

100 ml of sample of water requires 3.92 mg of K_2 Cr_2O_3 in presence

1.	100 ml of sample of water requires 3.92 mg of K_2 Cr_2O_3 in presence of H_2SO_4 for the oxidation of dissolved organic matter present in it. The COD of the water sample in ppm
Answer» 3.1 6.4 12.4 8.2 Answer :B