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Give reason for the folloiwng : (a) E(...

Give reason for the folloiwng :
(a) `E_("value")^(@)` for `Mn^(3+)//Mn^(2+)` couple is much more positive than that of `Fe^(3+)//Fe^(2+)` couple.
(b) Iron has higher enthalpy of atomization then that of copper.
(c) `Sc^(3+)` is colourless in aqueous solution whereas `Ti^(3+)` is coloured.

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Sc^(3+) is colourless is aqueous solution whereas Ti^(3+) is coloured.

Give reason : Sc^(3+) is colourless in aqueous solution whereas Ti^(3+) is coloured.

Account for the following : The E^(0) value for the Mn^(3+)|Mn^(2+) couple is much more positive than that for the Cr^(3+)|Cr^(2+) couple.

Give reason for the folloiwng : (a) E_("value")^(@) for Mn^(3+)//Mn^(2+) couple is much more positive than that of Fe^(3+)//Fe^(2+) couple. (b) Sc^(3+) is colourless in aqueous solution whereas Ti^(3+) is coloured.

Account for the following : The E^@ value for the Mn^(3+)|Mn^(2+) couple is much more positive than that for Cr^(3+)|Cr^(2+) couple.

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