Oxidation number of P in `PO_(4)^(3-)`, of S in `SO_(4)^(2-)` and that of `Cr_(2)O_(7)^(2-)` are respectively

Options

A. `+3, +6 and +6`
B. `+5 , +6 and +6`
C. `+3,+6 and +5`
D. `+5 , +3 and +6`

Answer

B

Explanation

`PO_(4)^(3-)` , oxidation no. of `P implies +5 `
`SO_(4)^(2-)` , oxidation no. of `S implies +6 `
`Cr_(2)O_(7)^(2-)` , oxidation no. of Cr `implies +6 `