In `PO_(4)^(3-)` the formal charge on each O-atom and `P-O` bond order respectively are .

Options

A. `-0.75, 0.6`
B. `-0.75 , 1.0`
C. `-0.75, 1.25`
D. `-3,1.25`

Answer

C

Explanation

P-O bond order
`="Total Number of bonds in all possible direction between two atoms"/"Total number of resonating structures"`
`=(2+1+1+1)/4=5/4=1.25`
`therefore` Bond order =1.25
Resonating structures are

Total charge on `PO_4^(3-)` ion is -3 =`"Total charge"/"Total entity of O-atom"`
So, the average formal charge on each O-atom is =`-3/4=-0.75`