How many of the following statements are correct?
(i) Manganese exhibits +7 oxidation state in one of its oxide.
(ii) Ruthenium and Osmium exhibit +8 oxidation in their oxides.
(iii) Sc shows +4 oxidation state which is oxidizing in nature
(iv) Cr shows oxidising nature in +6 oxidation state.

Question

How many of the following statements are correct?

(i) Manganese exhibits +7 oxidation state in one of its oxide.

(ii) Ruthenium and Osmium exhibit +8 oxidation in their oxides.

(iii) Sc shows +4 oxidation state which is oxidizing in nature

(iv) Cr shows oxidising nature in +6 oxidation state.

TestHub · Accepted Answer

(i), (ii) and (iv) correct

Manganese exhibits +7 oxidation state in its oxide. $(Mn_{2} O_{7})$

Ru & Os form $RuO_{4}$ & $OSO_{4}$ oxide in +8 oxidation state

Cr in +6 oxidation state acts as on oxidising agent

Sc does not show +4 oxidation state.

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