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Water pollution

100 ml of sample of water requires 3.92 mg of K2Cr2 O7 in presence of H2SO4 for the oxidation of dissolved organic matter present in it. The COD of the water sample in ppm


COD=COD=wt .of K2Cr2O7×8×10649×sample of water in ml3.92×10-3×8×10649×100=6.4

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