5081. Catalyst used in the manufacture of sulphuric acid by chamber & contact processes are respectively
V₂O₅ & Cr₂O₃
Oxides of nitrogen & Cr₂O₃
V₂O₅ on a porous carrier & oxides of nitrogen
Oxides of nitrogen & V₂O₅ on a porous carrier
✅ The correct answer is option D.