JEE MAIN - Chemistry (2023 - 29th January Evening Shift - No. 7)
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.
(ii), (iii) and (iv)
(ii) and (iii)
(i) and (iii)
(i), (ii) and (iv)
Explanation
(i) $$\mathrm{Mn_2O_7\to Mn}$$ in (+7) oxidation state
(ii) It is also correct
(iii) Sc only shows +3 oxidation state
(iv) $$\mathrm{Cr^{+6}}$$ is oxidising in nature
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