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Elements of Groups 16, 17 and 18 — Chemistry STD 12 Science — Question

Maharashtra BoardEnglish MediumSTD 12 ScienceChemistryElements of Groups 16, 17 and 182 Marks
Question
Oxygen forms only $OF_2$​​​​​​​ with fluorine while sulphur forms $SF_6​​​​​​​$​​​​​​​. Explain. Why?
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Answer

  • Oxygen combines with the most electronegative element fluorine to form $OF_2$ and exhibits positive oxidation state $(+ 2)$. Since, oxygen does not have vacant J-orbitals it cannot exhibit higher oxidation states.
  • Sulphur has vacant d-orbitals and hence can exhibit + $6$ oxidation state to form $SF_6$​​​​​​​.

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