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1
JEE Main 2025 (Online) 24th January Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Match List - I with List - II.

List - I
(Transition metal ion)		 List - II
(Spin only magnetic moment (B.M.))
(A) $\mathrm{Ti}^{3+}$ (I) 3.87
(B) $\mathrm{V}^{2+}$ (II) 0.00
(C) $\mathrm{Ni}^{2+}$ (III) 1.73
(D) $\mathrm{Sc}^{3+}$ (IV) 2.84

Choose the correct answer from the options given below :

A
$\mathrm{(A) -(III}),(\mathrm{B})-(\mathrm{I}),(\mathrm{C})-(\mathrm{IV}),(\mathrm{D})-(\mathrm{II})$
B
$(\mathrm{A})-(\mathrm{II}),(\mathrm{B})-(\mathrm{IV}),(\mathrm{C})-(\mathrm{I}),(\mathrm{D})-(\mathrm{III})$
C
$(\mathrm{A})-(\mathrm{III}),(\mathrm{B})-(\mathrm{I}),(\mathrm{C})-(\mathrm{II}),(\mathrm{D})-(\mathrm{IV})$
D
$(\mathrm{A})-(\mathrm{IV}),(\mathrm{B})-(\mathrm{II}),(\mathrm{C})-(\mathrm{III}),(\mathrm{D})-(\mathrm{I})$
2
JEE Main 2025 (Online) 24th January Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Preparation of potassium permanganate from $\mathrm{MnO}_2$ involves two step process in which the 1st step is a reaction with KOH and $\mathrm{KNO}_3$ to produce

A
$\mathrm{K}_3 \mathrm{MnO}_4$
B
$\mathrm{K}_4\left[\mathrm{Mn}(\mathrm{OH})_6\right]$
C
$\mathrm{K}_2 \mathrm{MnO}_4$
D
$\mathrm{KMnO}_4$
3
JEE Main 2025 (Online) 24th January Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Which of the following ions is the strongest oxidizing agent? (Atomic Number of $\mathrm{Ce}=58, \mathrm{Eu}=63, \mathrm{~Tb}=65, \mathrm{Lu}=71$)

A
$\mathrm{Lu}^{3+}$
B
$\mathrm{Eu}^{2+}$
C
$\mathrm{Tb}^{4+}$
D
$\mathrm{Ce}^{3+}$
4
JEE Main 2025 (Online) 23rd January Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Match List - I with List - II

List - I List - II
(A) Bronze (I) Cu, Ni
(B) Brass (II) Fe, Cr, Ni, C
(C) UK silver coin (III) Cu, Zn
(D) Stainless steel (IV) Cu, Sn

Choose the correct answer from the options given below :

A
(A)-(IV), (B)-(II), (C)-(III), (D)-(I)
B
(A)-(IV), (B)-(III), (C)-(I), (D)-(II)
C
(A)-(III), (B)-(I), (C)-(IV), (D)-(II)
D
(A)-(III), (B)-(IV), (C)-(II), (D)-(I)
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