Question

The oxyacids of phosphorous which show powerful reducing properties but no oxidizing
properties are :

• A. $H_{3}P{O}_2,H_{3}P{O}_3$
• B. $H_{3}P{O}_2,H_{3}P{O}_4$
• C. $H_{3}P{O}_3,H_{3}P{O}_4$
• D. $HP{O}_3,H_{3}P{O}_3$

Answer 1

The correct option is A $H_{3}P{O}_2,H_{3}P{O}_3$

Both are powerful reducing agents as they contain P - H bonds. Non-reducing (because no $P-H$ bonds). None of the oxyacids of phosphorus are oxidizing.