For the COD test of sewage, organic matter is oxidised by K2 Cr2O7 in – McqOptions

MCQOPTIONS

1.	For the COD test of sewage, organic matter is oxidised by K2 Cr2O7 in the presence of
A.	H2SO4
B.	HNO3
C.	HCl
D.	None of these
Answer» B. HNO3

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