Question

In a molecule of pyrophosphoric acid, the number of P-OH, P = O and P - O - P bonds/moiety (ies) respectively is:

• A. 3, 3 and 3
• B. 4, 2 and 1
• C. 2, 4 and 1
• D. 4, 2 and 0

Answer 1

The correct option is B

4, 2 and 1

Solution: In pyrophosphoric acid, phosphorus is bonded with O and OH

The valency of phosphorus is 5, oxygen is 2 and OH is 1. To satisfy respective valencies the structure and number of bonds will be as below

P – OH bonds = 4

P = O bonds = 2

P – O – P linkage = 1

So, the correct option is B.