The set of correct statements is :
(i) Manganese exhibits +7 oxidation state in 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.
Solution
<p>(i) $\mathrm{Mn_2O_7\to Mn}$ in (+7) oxidation state</p>
<p>(ii) It is also correct</p>
<p>(iii) Sc only shows +3 oxidation state</p>
<p>(iv) $\mathrm{Cr^{+6}}$ is oxidising in nature</p>
About this question
Subject: Chemistry · Chapter: d and f Block Elements · Topic: Properties of Transition Metals
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