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06-03-2024
Chemistry

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100ml of a water sample requires 3.92mg of K₂Cr₂O ₇ in the presence of H₂SO₄for the oxidation of dissolved organic matter present in it. The COD of the water sample in ppm?
A) 39.2ppm
B) 49.0ppm
C) 78.4ppm
D) 98.0ppm

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