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Q.

The set of correct statements is:

(i) Manganese exhibits +7 oxidation state in its oxide.
(ii) Ruthenium and Osmium exhibit +8 oxidition in their oxides.
(iii) Sc shows +4 oxidition state which is oxidizing in nature.
(iv) Cr shows oxidizing nature in +6 oxidation state.

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a

(i) and (iii)

b

(ii), (iii) and (iv)

c

(i), (ii) and (iv)

d

(ii) and (iii)

answer is C.

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Detailed Solution

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1,2,4 Statements are correct.

Sc shows +4 oxidation state which is redusing in nature. It is the highest possible oxidation state of Sc.

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The set of correct statements is:(i) Manganese exhibits +7 oxidation state in its oxide.(ii) Ruthenium and Osmium exhibit +8 oxidition in their oxides.(iii) Sc shows +4 oxidition state which is oxidizing in nature.(iv) Cr shows oxidizing nature in +6 oxidation state.