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Chemical Oxygen Demand of Waste water
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1)Chemical Oxygen Demand (COD) is used the quantification of 
  

2)The chemical oxygen demand measures the ………. 
  

3)Potassium dichromate in this test is used as 
  

4)The liquid hazardous wastes generated as a result of COD test are 
  

5)Usually COD test values are 
  


  


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