Question

Phosphorus has the oxidation state +3 in

• A. Phosphorus acid
• B. Hypophosphorus acid
• C. Orthophosphoric acid
• D. Metaphosphoric acid

Answer 1

Answer: (A)

$H_3^{+1}P{O}_3^{x-2}$
+ 1 x 3 + $x$ - 2 x 3 = 0
or $x$ + 3 - 6 = 0 or $x$ = + 3