Question

Concentrated nitric acid oxidises phosphours (P) into :

• A. PH3
• B. P2O5
• C. H3PO3
• D. H3PO4

Answer 1

Answer: (D)

H3PO4

Answer 2

P4 + 20HNO3 (concentrated) ¾® 4H3PO4 + 20NO2

+ 4H2O.