d and f Block Elements — JEE Main · 2026 · 28 Jan 2026 · Shift 2 Question with Solution

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:

(A)A, C and D Only
(B)A, B and C Only
(C)A, D and E Only
(D)A and D Only✓ Correct

Answer: (D)

Solution

Both

Mn O_{4}^{2 -}

and

Mn O_{4}^{-}

are

s p^{3}

and tetrahedral, so statement A is correct. Manganese is

+ 6

in manganate and

+ 7

in permanganate, the reverse of statement B, which is therefore wrong. Oxidation of a

Mn (II)

salt by peroxodisulphate yields permanganate, not manganate, so statement C is wrong. Manganate (

d^{1}

, one unpaired electron) is paramagnetic while permanganate (

d^{0}

) is diamagnetic, so statement D is correct. Acidified permanganate oxidises oxalate, nitrite and iodide rather than reducing them, so statement E is wrong. Only statements A and D are correct.

JEE Main · 2026 · 28 Jan 2026 · Shift 2 · Single correct option

JEE Main · 2026 · 28 Jan 2026 · Shift 2 · d and f Block Elements

Solution

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