Question

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. 

(1) (ii) and (iii) 

(2) (i), (ii) and (iv) 

(3) (i) and (iii) 

(4) (ii), (iii) and (iv)

Answer 1

(2) (i), (ii) and (iv) 

(i), (ii) and (iv) correct. Manganese exhibits +7 oxidation state in its oxide. (Mn₂O₇) 

Ru & Os from RuO₄ & OsO₄ oxide in +8 oxidation state 

Cr in +6 oxidation act is oxidizing. 

Sc does not show +4 oxidation state.