GKFix MCQ Question

What is the main reason for using fuming HNO₃ instead of dilute HNO₃ for phosphorus oxidation?

• A. Dilute HNO₃ is cheaper
• B. Dilute HNO₃ may not fully oxidize phosphorus
• C. Dilute HNO₃ reacts too fast
• D. Dilute HNO₃ is safer