For the COD test of sewage, organic matter is oxidised by K2Cr2O7 in the presence of________________?
Found an error? Read our corrections policy and submit a sourced correction below. You can also share a useful explanation in your own words.
A. HNO3
B. None of these
C. HCl
Found an error? Read our corrections policy and submit a sourced correction below. You can also share a useful explanation in your own words.