Give reasons:a. E0 value for Mn+3 /Mn+2 couple is more positive than that of Fe3+ /Fe2+.b. Iron has higher enthalpy of atomization than that of copper.c.Sc+3 is colorless in aqueous solution whereas Ti+3 is colored.

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Give reasons:
a. E⁰ value for Mn⁺³/Mn⁺² couple is more positive than that of Fe³⁺ /Fe²⁺.
b. Iron has higher enthalpy of atomization than that of copper.
c.Sc⁺³is colorless in aqueous solution whereas Ti⁺³ is colored.

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Detailed Solution

a. The value is greater for Mn⁺³ because of the presence of the half-filled d⁵ configuration, whereas Fe⁺² becomes stable after losing an electron.
b. Due to the presence of large number of unpaired electrons Iron have strong covalent bonding
hence enthalpy of atomization is more than Copper.
c. Sc⁺³ is colorless as it doesn’t contain any unpaired electron, Ti⁺³ is colored because it contains paired electrons and undergo d-d transition.

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