Q24 / 150 · MHT CET 2024 (11 May Shift 1) · Chemistry

What is oxidation number of S in $\mathrm{SO}_3^{2-}$ ?

  • A
    -2
  • B
    -3
  • Correct answer
    C
    +4
  • D
    +6

Solution

Let oxidation state of S be $x$ in $\mathrm{SO}_3^{2-}$. $\begin{aligned} & x+3(-2)=-2 \\ & x-6=-2 \\ \therefore \quad & x=6-2=+4 \end{aligned}$

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

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