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JEE Main202628 January 2026Evening ShiftChemistryd and f Block ElementsActual

Consider the following statements about manganate and permanganate ions. Identify the correct statements. A. The geometry of both manganate and permanganate ions is tetrahedral. B. The oxidation states of Mn in manganate and permanganate are +7 and +6, respectively. C. Oxidation of Mn (II) salt by peroxodisulphate gives manganate ion as the final product. D. Manganate ion is paramagnetic and permanganate ions is diam

Options

  1. AA, C and D Only
  2. BA and D Only
  3. CA, D and E Only
  4. DA, B and C Only

Correct answer

B. A and D Only

Step-by-step solution

Manganate ion → MnO ₄²⁻ Permanganate ion → MnO ₄⁻ (A) Both are tetrahedral ( d^3s hybridisation) TRUE (B) MnO ₄⁻ has Mn in +7 oxidation state; MnO ₄²⁻ has Mn in +6 oxidation state. The statement says +7 for manganate and +6 for permanganate, which is reversed. FALSE (C) Oxidation of Mn ²⁺ by peroxodisulphate ( S ₂ O ₈²⁻ ) gives permanganate ion ( MnO ₄⁻ ), not manganate ion. FALSE (D) MnO ₄⁻ is diamagnetic; MnO ₄²⁻ is paramagnetic. TRUE (E) Acidified permanganate ion oxidises (not reduces) oxalate, nitrite and iodi

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