Core Syllabus Module

d and f-Block Elements

Systematic mastery engine. Select a core micro-topic target below or simulate custom examination constraints.

Exam Simulator

Custom Chapter Mock Test

Generate random timed arrays filtered strictly by d and f-Block Elements weightage mappings.

Launch Simulator

Micro-Topic Strategy Matrix

d-block Elements

Repository FeedPractice

Inner Transition Elements

Repository FeedPractice

Chapter Elite-20 Challenge Zone

Target Advanced

JEE Main 2025

LEVELJEE Advanced

The pair(s) of diamagnetic ions is(are)

* Multiple Correct Options

(A)

La^{3 +}, Ce^{4 +}

(B)

Yb^{2 +}, Lu^{3 +}

(C)

La^{2 +}, Ce^{3 +}

(D)

Yb^{3 +}, Lu^{2 +}

JEE Advanced 2019

LEVELJEE Advanced

Fusion of $MnO_{2}$ with $KOH$ in presence of $O_{2}$ produces a salt $W$ . Alkaline solution of $W$ upon eletrolytic oxidation yields another salt $X$ . The manganese containing ions present in $W$ and $X$ , respectively, are $Y$ and $Z$ . Correct statement(s) is (are)

* Multiple Correct Options

(A)

Y

is diamagnetic in nature while

Z

is paramagnetic

(B)

Both

Y

and

Z

are coloured and have tetrahedral shape

(C)

In both

Y

and

Z

π

-bonding occurs between p-orbitals of oxygen and d-orbitals of manganese.

(D)

In aqueous acidic solution,

Y

undergoes disproportionation reaction to give

Z

and

MnO_{2}

JEE Advanced 2014

LEVELJEE Advanced

Consider the following list of reagents : Acidified $K_{2} Cr_{2} O_{7}$ , alkaline $KMnO_{4}$ , $CuSO_{4}$ , $H_{2} O_{2}$ , $Cl_{2}$ , $O_{3}$ , $FeCl_{3}$ , $HNO_{3}$ and $Na_{2} S_{2} O_{3}$ . The total number of reagents that can oxidise aqueous iodide to iodine is

LEVELJEE Advanced

If $Fe^{3 +}$ and $Cr^{3 +}$ both are present in group III of qualitative analysis, then distinction can be made by

(A)

addition of

NH_{4} OH

in the presence of

NH_{4} Cl

when only

Fe(OH)_{3}

is precipitated

(B)

addition of

NH_{4} OH

in presence of

NH_{4} Cl

when

Cr(OH)_{3}

and

Fe(OH)_{3}

both are precipitated and on adding

Br_{2}

water and

NaOH

Cr(OH)_{3}

dissolves

(C)

precipitate of

Cr(OH)_{3}

and

Fe(OH)_{3}

as obtained in (b) are treated with conc.

HCl

when only

Fe(OH)_{3}

An inorganic compound 'X' on treatment with concentrated $H_{2} S O_{4}$ produces brown fumes and gives dark brown ring with $F e S O_{4}$ in presence of concentrated $H_{2} S O_{4}$ . Also compound 'X' gives precipitate 'Y', when its solution in dilute HCl is treated with $H_{2} S$ gas. The precipitate 'Y' on treatment with concentrated $H N O_{3}$ followed by excess of $N H_{4} O H$ further gives deep blue coloured solution, compound 'X' is

(A)

C o (N O_{3})_{2}

(B)

P b (N O_{2})_{2}

(C)

C u (N O_{3})_{2}

(D)

P b (N O_{3})_{2}

JEE Main 2013

LEVELJEE Advanced

Four successive members of the first row transition elements listed below with atomic numbers. Which one of them is expected to have the highest $E_{M^{3 +} / M^{2 +}}^{\circ}$ value?

(A)

Cr (

Z = 24

)

(B)

Mn (

Z = 25

)

(C)

Fe (

Z = 26

)

(D)

Co (

Z = 27

)

LEVELJEE Advanced

The correct order of $E_{M^{2 +} / M}^{\circ}$ values with negative sign for the four successive elements Cr, Mn, Fe and Co is

$A 4 KOH, O_{2} (Green) 2 B + 2 H_{2} O$ $3 B 4 HCl (Purple) 2 C + M n O_{2} + 2 H_{2} O$ $2 C H_{2} O, K I 2 A + 2 K O H + D$ In the above sequence of reactions, $A$ and $D$ , respectively, are

(A)

K I

and

K M n O_{4}

(B)

M n O_{2}

and

K I O_{3}

(C)

K I

and

K_{2} M n O_{4}

(D)

K I O_{3}

and

M n O_{2}

JEE Advanced 2015

LEVELJEE Main

The correct statement(s) about $Cr^{2 +}$ and $Mn^{3 +}$ is (are) [Atomic numbers of $Cr = 24$ and $Mn = 25$ ]

* Multiple Correct Options

(A)

Cr^{2 +}

is a reducing agent

(B)

Mn^{3 +}

is an oxidizing agent

(C)

Both

Cr^{2 +}

and

Mn^{3 +}

exhibit

d^{4}

electronic configuration

(D)

When

Cr^{2 +}

is used as a reducing agent, the chromium ion attains

d^{5}

electronic configuration

JEE Main 2013

LEVELJEE Main

Which of the following arrangements does not represent the correct order of the property stated against it?

(A)

V^{2 +} < C r^{2 +} < M n^{2 +} < F e^{2 +}

: paramagnetic behaviour

(B)

N i^{2 +} < C o^{2 +} < F e^{2 +} < M n^{2 +}

: ionic size

(C)

C o^{3 +} < F e^{3 +} < C r^{3 +} < S c^{3 +}

: stability in aqueous solution

(D)

S c < T i < C r < M n

: number of oxidation states

JEE Main 2021

LEVELJEE Main

Given below are two statements. Statement I: Colourless cupric metaborate is reduced to cuprous metaborate in a luminous flame. Statement II: Cuprous metaborate is obtained by heating boric anhydride and copper sulphate in a non-luminous flame. In the light of the above statements, choose the most appropriate answer from the options given below.

(A)

Both statement I and statement II are true.

(B)

Both statement I and statement II are false.

(C)

Statement I is true but statement II is false.

(D)

Statement I is false but statement II is true.

JEE Main 2021

LEVELJEE Main

Arrange the following metal complex/compounds in the increasing order of spin only magnetic moment. Presume all the three, high spin system. (Atomic numbers $Ce = 58$ , $Gd = 64$ and $Eu = 63$ .) A. $(NH_{4})_{2} [Ce (NO_{3})_{6}]$ B. $Gd (NO_{3})_{3}$ and C. $Eu (NO_{3})_{3}$

Consider the following reactions : $N a C l + K_{2} C r_{2} O_{7} + H_{2} S O_{4} \to (A) + side products (conc)$ $(A) + N a O H \to (B) + side products$ $(B) + H_{2} S O_{4} + H_{2} O_{2} \to (C) + side products (dilute)$ The sum of the total number of atoms in one molecule each of (A), (B) and (C) is .............

JEE Main 2021

LEVELJEE Main

Given below are two statements. Statement I Potassium permanganate on heating at $573 K$ forms potassium manganate. Statement II Both potassium permanganate and potassium manganate are tetrahedral and paramagnetic in nature. In the light of the above statements, choose the most appropriate answer from the options given below

(A)

Statement I is true but statement II is false.

(B)

Both statement I and statement II are true.

(C)

Statement I is false but statement II is true.

(D)

Both statement I and statement II are false.

LEVELJEE Main

Calomel ( $Hg_{2} Cl_{2}$ ) on reaction with ammonium hydroxide gives

(A)

HgO

(B)

Hg_{2} O

(C)

NH_{2} —Hg—HgCl

(D)

HgNH_{2} Cl

LEVELJEE Main

A red solid is insoluble in water. However, it becomes soluble if some KI is added to water. Heating the red solid in a test tube results in liberation of some violet coloured fumes and droplets of a metal appear on the cooler parts of the test tube. The red solid is

(A)

(N H_{4})_{2} C r_{2} O_{7}

(B)

H g I_{2}

(C)

H g O

(D)

P b_{3} O_{4}

JEE Main 2020

LEVELJEE Main

The incorrect statement(s) among (1)-(3) is (are) 1. W(VI) is more stable than Cr(VI). 2. in the presence of HCl, permanganate titrations provide satisfactory results. 3. some lanthanoid oxides can be used as phosphors.

The colour of $KMnO_{4}$ is due to

(A)

M \to L

charge transfer transition

(B)

d - d

transition

(C)

L \to M

charge transfer transition

(D)

σ - σ^{*}

transition

LEVELJEE Main

Iron exhibits +2 and +3 oxidation states. Which of the following statements about iron is incorrect?

(A)

Ferrous oxide is more basic in nature than the ferric oxide

(B)

Ferrous compounds are relatively more ionic than the corresponding ferric compounds

(C)

Ferrous compounds are less volatile than the corresponding ferric compounds

(D)

Ferrous compounds are more easily hydrolysed than the corresponding ferric compounds

JEE Main 2020

LEVELJEE Main

The incorrect statement is :

(A)

Manganate ion is green in colour and permanganate ion is purple in colour.

(B)

Manganate and permanganate ions are paramagnetic.

(C)

In manganate and permanganate ions, the

π

-bonding takes place by overlap of p-orbitals of oxygen and d-orbitals of manganese.

(D)

Manganate and permanganate ions are tetrahedral.

Micro-Topic Strategy Matrix

d-block Elements

Inner Transition Elements

Chapter Elite-20 Challenge Zone

The pair(s) of diamagnetic ions is(are)

.math-text-wrapper .katex { font-size: 1.05em !important; } .math-text-wrapper .katex-display { margin: 1rem 0 !important; } If Fe3+ and Cr3+ both are present in group III of qualitative analysis, then distinction can be made by

.math-text-wrapper .katex { font-size: 1.05em !important; } .math-text-wrapper .katex-display { margin: 1rem 0 !important; } Four successive members of the first row transition elements listed below with atomic numbers. Which one of them is expected to have the highest EM3+/M2+∘​ value?

.math-text-wrapper .katex { font-size: 1.05em !important; } .math-text-wrapper .katex-display { margin: 1rem 0 !important; } The correct order of EM2+/M∘​ values with negative sign for the four successive elements Cr, Mn, Fe and Co is

.math-text-wrapper .katex { font-size: 1.05em !important; } .math-text-wrapper .katex-display { margin: 1rem 0 !important; } A4 KOH, O2​​(Green)2B​+2H2​O 3B4 HCl​(Purple)2C​+MnO2​+2H2​O 2CH2​O,KI​2A+2KOH+D In the above sequence of reactions, A and D, respectively, are

.math-text-wrapper .katex { font-size: 1.05em !important; } .math-text-wrapper .katex-display { margin: 1rem 0 !important; } The correct statement(s) about Cr2+ and Mn3+ is (are) [Atomic numbers of Cr=24 and Mn=25]

Which of the following arrangements does not represent the correct order of the property stated against it?

.math-text-wrapper .katex { font-size: 1.05em !important; } .math-text-wrapper .katex-display { margin: 1rem 0 !important; } Calomel (Hg2​Cl2​) on reaction with ammonium hydroxide gives

A red solid is insoluble in water. However, it becomes soluble if some KI is added to water. Heating the red solid in a test tube results in liberation of some violet coloured fumes and droplets of a metal appear on the cooler parts of the test tube. The red solid is

The incorrect statement(s) among (1)-(3) is (are) 1. W(VI) is more stable than Cr(VI). 2. in the presence of HCl, permanganate titrations provide satisfactory results. 3. some lanthanoid oxides can be used as phosphors.

.math-text-wrapper .katex { font-size: 1.05em !important; } .math-text-wrapper .katex-display { margin: 1rem 0 !important; } The colour of KMnO4​ is due to

Iron exhibits +2 and +3 oxidation states. Which of the following statements about iron is incorrect?

The incorrect statement is :

If $Fe^{3 +}$ and $Cr^{3 +}$ both are present in group III of qualitative analysis, then distinction can be made by

Four successive members of the first row transition elements listed below with atomic numbers. Which one of them is expected to have the highest $E_{M^{3 +} / M^{2 +}}^{\circ}$ value?

The correct order of $E_{M^{2 +} / M}^{\circ}$ values with negative sign for the four successive elements Cr, Mn, Fe and Co is

$A 4 KOH, O_{2} (Green) 2 B + 2 H_{2} O$ $3 B 4 HCl (Purple) 2 C + M n O_{2} + 2 H_{2} O$ $2 C H_{2} O, K I 2 A + 2 K O H + D$ In the above sequence of reactions, $A$ and $D$ , respectively, are

The correct statement(s) about $Cr^{2 +}$ and $Mn^{3 +}$ is (are) [Atomic numbers of $Cr = 24$ and $Mn = 25$ ]

Calomel ( $Hg_{2} Cl_{2}$ ) on reaction with ammonium hydroxide gives

The colour of $KMnO_{4}$ is due to