The set of correct statements is:(i) Manganes | vedclass

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(B) $(i)$ Manganese exhibits $+7$ oxidation state in its oxide,$Mn_2O_7$. This is a correct statement.$(ii)$ Ruthenium $(Ru)$ and Osmium $(Os)$ exhibi

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$(i), (ii)$ and $(iv)$

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(B) $(i)$ Manganese exhibits $+7$ oxidation state in its oxide,$Mn_2O_7$. This is a correct statement.$(ii)$ Ruthenium $(Ru)$ and Osmium $(Os)$ exhibit $+8$ oxidation state in their oxides,$RuO_4$ and $OsO_4$. This is a correct statement.$(iii)$ Scandium $(Sc)$ has an electronic configuration of $[Ar] 3d^1 4s^2$ and shows only $+3$ oxidation state. It does not show $+4$ oxidation state. This is an incorrect statement.$(iv)$ Chromium $(Cr)$ in its $+6$ oxidation state (e.g.,in $Cr_2O_7^{2-}$) acts as a strong oxidizing agent. This is a correct statement.Therefore,the correct statements are $(i), (ii)$ and $(iv)$.

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

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