Oxidation numbers of P in ` PO_4^(3-)`, of S in ` SO_4^(2-)`, and that of `Cr` in ` Cr_2O_7^(2-)` are respectively ,A. `-3`, `+6`, `+6`B. `+5`, `+3`, `+6`C. `+3`, `+6`, `+5`D. `+5`, `+6`, `+6`

Oxidation numbers of P in ` PO_4^(3-)`, of S in ` SO_4^(2-)`, and that

1.	Oxidation numbers of P in ` PO_4^(3-)`, of S in ` SO_4^(2-)`, and that of `Cr` in ` Cr_2O_7^(2-)` are respectively ,A. `-3`, `+6`, `+6`B. `+5`, `+3`, `+6`C. `+3`, `+6`, `+5`D. `+5`, `+6`, `+6`
Answer» Correct Answer - D Oxidation no. in each case. `PO_(4)^(3-)` `x+4(-2)= -3x=+5` `SO_(4)^(2-)` `x+(-2xx4)= -2` `x-8= -2` `x = -2+8x= +6` `Cr_(2)O_(7)^(2-)` `2x+(-2xx7)= -2` `2x-14= -2` `2x= -2+14` `2x=12` `x=+6`

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Oxidation numbers of P in ` PO_4^(3-)`, of S in ` SO_4^(2-)`, and that of `Cr` in ` Cr_2O_7^(2-)` are respectively ,A. `-3`, `+6`, `+6`B. `+5`, `+3`, `+6`C. `+3`, `+6`, `+5`D. `+5`, `+6`, `+6`

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