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.

• A. (ii) and (iii)
• B. (i), (ii) and (iv)
• C. (i) and (iii)
• D. (ii), (iii) and (iv)

Answer 1

Answer: (B)

(i), (ii) and (iv) correct.
Manganese exhibits $+7$ oxidation state in its oxide. $\left( Mn _2 O _7\right)$
$Ru \,\&\,Os$ from $RuO _4\, \& \,OsO _4$ oxide in $+8$ oxidation state
$Cr$ in $+6$ oxidation act is oxidizing.
$Sc$ does not show $+4$ oxidation state.