Which of the following has highest ratio of reducting hydrogen / OH :

Options

A. Orthophosphroric acid
B. Hypophosphorus acid
C. Phosphorus acid
D. Pyrophosphoric acid

Answer

B

Explanation

Orthophosphroric acid `(H_(3)PO_(4))` ratio `= ("Reducing Hydrogen")/("OH group")=(0)/(3)`
Hypophosphorus acid `(H_(3)PO_(2))` ratio `= ("Reducing Hydrogen")/("OH group") =(2)/(1) `
Phosphorus acid `(H_(3)PO_(2))` ratio `=(" Reducing Hydrogen")/("OH group") =(1)/(2) `
Pyrophosphoric acid `(H_(4)P_(2)O_(7))` ratio `= ("Reducing Hydrogen")/(" OH group")=(0)/(4)`