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Q.

Highest oxidation state of manganese in fluoride is +4(MnF4) but highest oxidation state in oxides is +7(Mn2O7)  because ____________.

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a

fluorine does not possess d-orbitals.

b

in covalent compounds fluorine can form single bond only while oxygen forms double bond.

c

fluorine is more electronegative than oxygen.

d

fluorine stabilises lower oxidation state.

answer is D.

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Detailed Solution

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Covalency of Mn is 7 in Mn2O7 and 4 in  MnF4

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