Question

The cyclotrimetaphosphoric acid is:

• A. ($HP{O}_3$)${}_3$ and contains total 9 bonds
• B. $H_3{P}_3{O}_6$ and contains total 12 bonds
• C. ($HP{O}_3$)${}_3$ and contains total 15 bonds.
• D. $H_3{P}_3{O}_9$ and contains $18\sigma -$ bonds

Answer 1

Answer: (C)

($HP{O}_3$)${}_3$ and contains total 15 bonds.

cyclotrimetaphosphoric acid is given as $(HP{O}_3{)}_3$ and it contains total 15 bonds including 12 $\sigma$ and 3 $\pi$ bonds.