1.

Oxygen forms only OF2 with fluorine while sulphur forms SF6. Explain. Why?

Answer»

Oxygen combines with the most electronegative element fluorine to form OF2 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 SF6.



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