Question:
Which of the following species contain an element in an oxidation state that is not a whole number?
Which of the following species contain an element in an oxidation state that is not a whole number?
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Fractional oxidation states indicate mixed oxidation states of atoms.
Updated On: Apr 23, 2026
- VO$_4^{3-}$
- Mn$_2$O$_3$
- S$_4$O$_6^{2-}$
- Cl$_2$O$_7$
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The Correct Option is C
Solution and Explanation
Concept:
Oxidation state is usually an integer, but in some species (like mixed valence compounds), average oxidation state may be fractional.
Step 1: Check S$_4$O$_6^{2-}$ (tetrathionate ion):
Let oxidation state of S = x \[ 4x + 6(-2) = -2 \] \[ 4x - 12 = -2 \Rightarrow 4x = 10 \Rightarrow x = 2.5 \]
Step 2: Interpretation:
This fractional value indicates different sulfur atoms have different oxidation states. Conclusion:
Hence, non-integer oxidation state exists.
Step 1: Check S$_4$O$_6^{2-}$ (tetrathionate ion):
Let oxidation state of S = x \[ 4x + 6(-2) = -2 \] \[ 4x - 12 = -2 \Rightarrow 4x = 10 \Rightarrow x = 2.5 \]
Step 2: Interpretation:
This fractional value indicates different sulfur atoms have different oxidation states. Conclusion:
Hence, non-integer oxidation state exists.
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