The number of `P-O-P` and `P-OH` bonds present respectively in pyrophosphoric acid molecule are

The number of P-O-P and P-O-H bonds present respectively, in pyrophosphoric acid molecule is

P-O-P bond is present in

O.N. of P in pyrophosphoric acid is

P-O-P bond is present in :

The number of peroxy bonds present in pyrophosphoric acid:

The number of S = O and S–OH bonds present in peroxodisulphuric acid and pyrosulphuric acid respectively are :