Q44 / 197 · NEET 2009 (Mains) · Chemistry

Oxidation number of $\mathrm{P}$ in $\mathrm{PO}_4^{3-}$, of $\mathrm{S}$ in $\mathrm{SO}_4^{2-}$ and that of $\mathrm{Cr}$ in $\mathrm{Cr}_2 \mathrm{O}_7^{2-}$ are respectively :

  • A
    $+3,+6$ and +6
  • Correct answer
    B
    $+5,+6$ and +6
  • C
    $+3,+6$ and +5
  • D
    $+5,+3$ and +6

Solution

$\mathrm{PO}_4^{3-}$, oxidation no. of $\mathrm{P} \Rightarrow+5$ $\mathrm{SO}_4^{2-}$, oxidation no. of $\mathrm{S} \Rightarrow+6$ $\mathrm{Cr}_2 \mathrm{O}_7^{2-}$, oxidation no. of $\mathrm{Cr} \Rightarrow+6$

Hence, the correct answer is option: 'B'.

Relevant Questions