JEE Main 2025 (Online) 28th January Morning Shift | d and f Block Elements Question 5 | Chemistry

The metal ion whose electronic configuration is not affected by the nature of the ligand and which gives a violet colour in non-luminous flame under hot condition in borax bead test is

$\mathrm{Cr}^{3+}$

$\mathrm{Ti}^{3+}$

$\mathrm{Ni}^{2+}$

$\mathrm{Mn}^{2+}$

JEE Main 2025 (Online) 24th January Evening Shift

MCQ (Single Correct Answer)

-1

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 :

$\mathrm{(A) -(III}),(\mathrm{B})-(\mathrm{I}),(\mathrm{C})-(\mathrm{IV}),(\mathrm{D})-(\mathrm{II})$

$(\mathrm{A})-(\mathrm{II}),(\mathrm{B})-(\mathrm{IV}),(\mathrm{C})-(\mathrm{I}),(\mathrm{D})-(\mathrm{III})$

$(\mathrm{A})-(\mathrm{III}),(\mathrm{B})-(\mathrm{I}),(\mathrm{C})-(\mathrm{II}),(\mathrm{D})-(\mathrm{IV})$

$(\mathrm{A})-(\mathrm{IV}),(\mathrm{B})-(\mathrm{II}),(\mathrm{C})-(\mathrm{III}),(\mathrm{D})-(\mathrm{I})$

JEE Main 2025 (Online) 24th January Morning Shift

MCQ (Single Correct Answer)

-1

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

$\mathrm{K}_3 \mathrm{MnO}_4$

$\mathrm{K}_4\left[\mathrm{Mn}(\mathrm{OH})_6\right]$

$\mathrm{K}_2 \mathrm{MnO}_4$

$\mathrm{KMnO}_4$

JEE Main 2025 (Online) 24th January Morning Shift

MCQ (Single Correct Answer)

-1

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

$\mathrm{Lu}^{3+}$

$\mathrm{Eu}^{2+}$

$\mathrm{Tb}^{4+}$

$\mathrm{Ce}^{3+}$