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Answer: (i) Mn 2+ is more stable than Mn 3+ because Mn +2 has exactly half-filled orbitals, while Fe +2 after losing one e – half-filled orbitals. (ii) Ce +4 achieve inert gas structure of Xenon, to require extra stability.

Explain why:
(i) E° for Mn³⁺/ Mn²⁺ couple is more positive than that Fe³⁺/Fe²⁺. (At. No. Mn = 25, Fe = 26).
(ii) Ce³⁺ can be easily oxidised to Ce⁴⁺ (At. No. Ce= 58).

Answer:

(i) Mn²⁺ is more stable than Mn³⁺ because Mn⁺² has exactly half-filled orbitals, while Fe⁺² after losing one e^– half-filled orbitals.
(ii) Ce⁺⁴ achieve inert gas structure of Xenon, to require extra stability.

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Explain why:(i) E° for Mn3+ / Mn2+ couple is more positive than that Fe3+/Fe2+. (At. No. Mn = 25, Fe = 26).(ii) Ce3+ can be easily oxidised to Ce4+ (At. No. Ce= 58).

Explain why:
(i) E° for Mn³⁺/ Mn²⁺ couple is more positive than that Fe³⁺/Fe²⁺. (At. No. Mn = 25, Fe = 26).
(ii) Ce³⁺ can be easily oxidised to Ce⁴⁺ (At. No. Ce= 58).