Consider the ionic reaction : `HC_(2)O_(4)^(-) +PO_(4)^(-3) hArr HPO_(4)^(2-) +C_(2) O_(4)^(2-)` Identify the incorrect statement (s)

Options

A. The above equilibrium mixture can act as buffer (both acids have nearly the same dissociation constant )
B. `HC_2O_4^(-) and C_(2) O_(4)^(-2)` are conjugate acid - base pairs
C. The P - O bond order in `PO_(4)^(-3) ` is 1.75
D. The C - O bond order in `C_(2)O_(4)^(2-)` is 1.50

Explanation

Buffer : Solution of weak acid and its salt . Since both `HC_(2)O_(5)^(-) and HPO_(4)^(2-)` same dissociation constant the solution can act as buffer.
`underset("acid")(HC_(2)O_4^(-))+underset("base")(PO_4^(-3))hArrunderset("acid")underset("conjugate")(HPO_4^(2-))+underset("base")underset("conjugate")(C_2O_4^(2-))`

Bond order =` ("No of bonds in any one resonating structure")/("Total no. of resonating structure")`
`B.O(PO_4^(3-))=5/4=1.25 , underset(("C-O bond"))(B.O(C_2O_4^(2-)))=3/2=1.5`
`:Nunderset(15e^(-))overset(...)(=)O:overset(e^(-))rarrunderset(14e^(-))(NO^(+))`