The stability of Mn2+, Fe<sup>2+</sup>, Cr<sup>2+</sup>, Co<sup>2+</sup> is in order of (At No. of Mn = 25, Fe = 26, Cr = 24, Co = 27)

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Q. The stability of Mn2+, Fe²⁺, Cr²⁺, Co²⁺ is in order of (At No. of Mn = 25, Fe = 26, Cr = 24, Co = 27)

(A) Mn²⁺ > Fe²⁺ > Cr²⁺ > Co²⁺
(B) Fe²⁺ > Mn²⁺ > Co²⁺ > Cr²⁺
(C) Co²⁺ > Mn²⁺ > Fe²⁺ > Cr²⁺
(D) Cr²⁺ > Mn²⁺ > Co²⁺ > Fe²⁺

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✅ Correct Answer: (A) Mn²⁺ > Fe²⁺ > Cr²⁺ > Co²⁺

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