Question

The number of $P ??OH$ bonds and the oxidation state of phosphorus atom in pyrophosphoric acid $(H_4P_2O_7)$ respectively are

• A. #ERROR!
• B. #ERROR!
• C. #ERROR!
• D. #ERROR!

Answer 1

Answer: (C)

#ERROR!

Answer 2

Pyrophosphoric acid : $H _{4} P _{2} O _{7}$ Let Oxidation state of $P$ be $x$ $\Rightarrow 4 \times(+1)+2 x+7 \times(-2)=0$ $\Rightarrow 4+2 x-14=0$ $\Rightarrow x=+5$ basicity of acid is four.