d-block Elements

Interactive Feed

JEE Advanced 2025

One of the products formed from the reaction of permanganate ion with iodide ion in neutral aqueous medium is

I_{2}

(B)

IO_{3}^{-}

(C)

IO_{4}^{-}

(D)

IO_{2}^{-}

JEE Advanced 2020

LEVELJEE Main

An acidified solution of potassium chromate was layered with an equal volume of amyl alcohol. When it was shaken after the addition of 1 mL of 3% H2O2, a blue alcohol layer was obtained. The blue color is due to the formation of a chromium (VI) compound 'X' . What is the number of oxygen atoms bonded to chromium through only single bonds in a molecule of X?

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 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 2017

LEVELJEE Main

Which of the following combination will produce $H_{2}$ gas?

(A)

Zn metal and NaOH(aq)

(B)

Au metal and NaCN(aq) in the presence of air

(C)

Cu metal and conc.

HNO_{3}

(D)

Fe metal and conc.

HNO_{3}

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

)

JEE Main 2019

LEVELJEE Main

The correct order of the first ionisation enthalpies is

In context with the transition elements, which of the following statements is incorrect?

(A)

In addition to the normal oxidation state, the zero oxidation state is also shown by these elements in complexes

(B)

In the highest oxidation states, the transition metal shows basic character and form cationic complexes

(C)

In the highest oxidation states of the first five transition elements (Sc to Mn), all the

4 s

and

3 d

electrons are used for bonding

(D)

Once the

d^{5}

configuration is exceeded, the tendency to involve all the

3 d

electrons in bonding decreases

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

The nature of oxides $V_{2} O_{3}$ and $CrO$ is indexed as 'X' and 'Y' type respectively. The correct set of X and Y is

(A)

X = basic, Y = amphoteric

(B)

X = amphoteric, Y = basic

(C)

X = acidic, Y = acidic

Which one of the following nitrates will leave behind a metal on strong heating?

Consider the hydrated ions of $Ti^{2 +}$ , $V^{2 +}$ , $Ti^{3 +}$ and $Sc^{3 +}$ . The correct order of their spin-only magnetic moment is

(A)

Sc^{3 +} < Ti^{3 +} < Ti^{2 +} < V^{2 +}

(B)

Sc^{3 +} < Ti^{3 +} < V^{2 +} < Ti^{2 +}

(C)

Ti^{3 +} < Ti^{2 +} < Sc^{3 +} < V^{2 +}

(D)

V^{2 +} < Ti^{2 +} < Ti^{3 +} < Sc^{3 +}

JEE Main 2021

LEVELJEE Main

In which of the following pairs, the outer most electronic configuration will be the same?

(A)

V^{2 +}

and

C r^{+}

(B)

C r^{+}

and

M n^{2 +}

(C)

N i^{2 +}

and

C u^{+}

(D)

F e^{2 +}

and

C o^{+}

JEE Main 2019

LEVELJEE Main

The highest value of the calculated spin only magnetic moment (in BM) among all the transition metal complexes is

The set that contains atomic numbers of only transition elements, is

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

In mild alkaline medium, thiosulphate ion is oxidised by $MnO_{4}^{-}$ to "A". The oxidation state of sulphur in "A" is ......... .

JEE Main 2021

LEVELJEE Main

The common positive oxidation states for an element with atomic number 24, are

$Fe x_{2}$ and $Fe y_{3}$ are known when $x$ and $y$ are

(A)

x = F, Cl, Br, I

and

y = F, Cl and Br

(B)

x = F, Cl, Br

and

y = F, Cl, Br and I

(C)

x = Cl, Br, I

and

y = F, Cl, Br and I

(D)

x = F, Cl, Br, I

and

y = F, Cl, Br and I

JEE Main 2021

LEVELJEE Main

What is the correct order of the following elements with respect to their density ?

(A)

Cr < Zn < Co < Cu < Fe

(B)

Zn < Cu < Co < Fe < Cr

(C)

Zn < Cr < Fe < Co < Cu

(D)

Cr < Fe < Co < Cu < Zn

JEE Main 2019

LEVELJEE Main

The pair that has similar atomic radii is

In the given chemical reaction, colours of the $Fe^{2 +}$ and $Fe^{3 +}$ ions, are respectively $5 Fe^{2 +} + MnO_{4}^{-} + 8 H^{+} ⟶ Mn^{2 +} + 4 H_{2} O + 5 Fe^{3 +}$

One of the products formed from the reaction of permanganate ion with iodide ion in neutral aqueous medium is

.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]

.math-text-wrapper .katex { font-size: 1.05em !important; } .math-text-wrapper .katex-display { margin: 1rem 0 !important; } Which of the following combination will produce H2​ gas?

.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?

The correct order of the first ionisation enthalpies is

In context with the transition elements, which of the following statements is incorrect?

.math-text-wrapper .katex { font-size: 1.05em !important; } .math-text-wrapper .katex-display { margin: 1rem 0 !important; } The nature of oxides V2​O3​ and CrO is indexed as 'X' and 'Y' type respectively. The correct set of X and Y is

Which one of the following nitrates will leave behind a metal on strong heating?

.math-text-wrapper .katex { font-size: 1.05em !important; } .math-text-wrapper .katex-display { margin: 1rem 0 !important; } Consider the hydrated ions of Ti2+, V2+, Ti3+ and Sc3+. The correct order of their spin-only magnetic moment is

In which of the following pairs, the outer most electronic configuration will be the same?

The highest value of the calculated spin only magnetic moment (in BM) among all the transition metal complexes is

The set that contains atomic numbers of only transition elements, is

.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; } In mild alkaline medium, thiosulphate ion is oxidised by MnO4−​ to "A". The oxidation state of sulphur in "A" is ......... .

The common positive oxidation states for an element with atomic number 24, are

.math-text-wrapper .katex { font-size: 1.05em !important; } .math-text-wrapper .katex-display { margin: 1rem 0 !important; } Fex2​ and Fey3​ are known when x and y are

What is the correct order of the following elements with respect to their density ?

The pair that has similar atomic radii is

.math-text-wrapper .katex { font-size: 1.05em !important; } .math-text-wrapper .katex-display { margin: 1rem 0 !important; } In the given chemical reaction, colours of the Fe2+ and Fe3+ ions, are respectively 5Fe2++MnO4−​+8H+⟶Mn2++4H2​O+5Fe3+

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

Which of the following combination will produce $H_{2}$ gas?

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 nature of oxides $V_{2} O_{3}$ and $CrO$ is indexed as 'X' and 'Y' type respectively. The correct set of X and Y is

Consider the hydrated ions of $Ti^{2 +}$ , $V^{2 +}$ , $Ti^{3 +}$ and $Sc^{3 +}$ . The correct order of their spin-only magnetic moment is

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

In mild alkaline medium, thiosulphate ion is oxidised by $MnO_{4}^{-}$ to "A". The oxidation state of sulphur in "A" is ......... .

$Fe x_{2}$ and $Fe y_{3}$ are known when $x$ and $y$ are

In the given chemical reaction, colours of the $Fe^{2 +}$ and $Fe^{3 +}$ ions, are respectively $5 Fe^{2 +} + MnO_{4}^{-} + 8 H^{+} ⟶ Mn^{2 +} + 4 H_{2} O + 5 Fe^{3 +}$