COD of a water sample is 8ppm the weight of acidified K2Cr207 required to oxidise the organie matter present in one litre of water sample is4) 98 mg2) 49 mg3) 196 mg1) 98 g

COD of a water sample is 8ppm the weight of acidified K2Cr207 required

1.	COD of a water sample is 8ppm the weight of acidified K2Cr207 required to oxidise the organie matter present in one litre of water sample is4) 98 mg2) 49 mg3) 196 mg1) 98 g
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