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JEE Main 202628 JanuaryEvening Shift
Exam
JEE Main
Year
2026
Date
28 January
Shift
Evening Shift
Subject
Chemistry
Chapter
d and f Block Elements

JEE Main 2026 · 28 January · Evening Shift · Chemistry · d and f Block Elements

Consider the following statements about manganate and permanganate...

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 diamagnetic.
E. Acidified permanganate ion reduces oxalate, nitrite and iodide ions.
Choose the correct answer from the options given below :

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 → MnO42−\text{MnO}_4^{2-}
Permanganate ion → MnO4−\text{MnO}_4^{-}
(A) Both are tetrahedral (d3sd^3s hybridisation) TRUE
(B) MnO4−\text{MnO}_4^{-} has Mn in +7 oxidation state; MnO42−\text{MnO}_4^{2-} has Mn in +6 oxidation state. The statement says +7 for manganate and +6 for permanganate, which is reversed. FALSE
(C) Oxidation of Mn2+\text{Mn}^{2+} by peroxodisulphate (S2O82−\text{S}_2\text{O}_8^{2-}) gives permanganate ion (MnO4−\text{MnO}_4^{-}), not manganate ion. FALSE
(D) MnO4−\text{MnO}_4^{-} is diamagnetic; MnO42−\text{MnO}_4^{2-} is paramagnetic. TRUE
(E) Acidified permanganate ion oxidises (not reduces) oxalate, nitrite and iodide ions. FALSE
Correct statements: A and D only.
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