1.

Highest oxidation state of manganese in fluorides is + 4 (MnF_4) but highest oxidation state in oxides is + 7 (Mn_(2)O_7) because

Answer»

fluorine is more electronegative than oxygen
fluorine does not possess d-orbitals
fluorine stabilises lower OXIDATION state
In covalent compounds, fluorine can form SINGLE bond only while oxygen FORMS DOUBLE bond

Solution :In covalent compounds, fluorine can form single bond only while oxygen forms double bond


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