HomeEngineeringFor the COD test of sewage, organic matter is oxidised by K2Cr2O7 in the presence of________________? 356. For the COD test of sewage, organic matter is oxidised by K2Cr2O7 in the presence of________________?By Admin / September 7, 2025 A. H2SO4 B. HNO3 C. HCl D. None of these ✅ The correct answer is option A.
1. A fire tube boiler is limited to a maximum steam pressure of about __________ kg/cm². Leave a Comment / Basic Chemical Engineering MCQs, Chemical Engineering, Engineering / By Admin
2. Transformer cores are normally made from Leave a Comment / Basic Chemical Engineering MCQs, Chemical Engineering, Engineering / By Admin