Question

Which oxoacid of phosphorous has the highest number of oxygen atoms present in its chemical formula?

• A. Pyrophosphoric acid
• B. Hypophosphoric acid
• C. Pyrophosphorus acid
• D. Phosphoric acid

Answer 1

The correct option is A Pyrophosphoric acid

$\begin{array}{cc}\text{Pyrophosphorus acid}& \to H_4{P}_2{O}_5\\ \text{Hypophosphoric acid}& \to H_4{P}_2{O}_6\\ \text{Phosphoric acid}& \to H_{3}P{O}_4\\ \text{Pyrophosphoric acid}& \to H_4{P}_2{O}_7\end{array}$