Question

Phosphorus has oxidation state, $+\,3$ in:

• A. metaphosphoric acid
• B. hypophosphorus acid
• C. orthophosphoric acid
• D. orthophosphorus acid

Answer 1

Answer: (D)

orthophosphorus acid

Answer 2

Phosphorus has an oxidation state of + 3 in orthophosphorus acid $({{H}_{3}}P{{O}_{3}})$ . $3\,(+1)+x+3\,(-\,2)=0$ $x+3-6=0$ $x=+3$