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How would you account for the following?...

How would you account for the following?
(i) The highest oxidation state of a transition metal is usually exhibited in its oxide.
(ii) The oxidising power of the following three oxo ions in the series follows the order :
`VO_(2)^(+)ltCr_(2)O_(7)^(2-)ltMnO_(4)^(-)`

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Verified by Experts

(i) Because oxygen ha small size and high electro negaitivity .Hence they can oxidize the metal to the highest oxidation state
(ii) See Q 29 (b) (i) set I (O.D)-2010
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