Coordination Compounds - Inorganic Chemistry - Chemistry Previous Year Questions

1

2017 · Chemistry · Inorganic Chemistry · Coordination Compounds

WB JEE 2017

The number of unpaired electrons in \({[NiC{l_4}]^{2 - }}\), \(Ni{(CO)_4}\) and \({[Cu{(N{H_3})_4}]^{2 + }}\) respectively are

A

2, 2, 1

B

2, 0, 1

C

0, 2, 1

D

2, 2, 0

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2

2018 · Chemistry · Inorganic Chemistry · Coordination Compounds

WB JEE 2018

Ferric ion forms a Prussian blue precipitate due to the formation of

A

\({K_4}[Fe{(CN)_6}]\)

B

\({K_3}[Fe{(CN)_6}]\)

C

\(Fe{(CNS)_3}\)

D

\(F{e_4}{[Fe{(CN)_6}]_3}\)

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3

2018 · Chemistry · Inorganic Chemistry · Coordination Compounds

WB JEE 2018

The main reason that SiCl₄ is easily hydrolysed as compared to CCl₄ is that

A

Si \(-\) Cl bond is weaker than C \(-\) Cl bond

B

SiCl₄ can form hydrogen bonds

C

SiCl₄ is covalent

D

Si can extend its coordination number beyond four

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4

2018 · Chemistry · Inorganic Chemistry · Coordination Compounds

WB JEE 2018

Silver chloride dissolves in excess of ammonium hydroxide solution. The cation present in the resulting solution is

A

\({[Ag{(N{H_3})_6}]^ + }\)

B

\({[Ag{(N{H_3})_4}]^ + }\)

C

Ag⁺

D

\({[Ag{(N{H_3})_2}]^ + }\)

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5

2019 · Chemistry · Inorganic Chemistry · Coordination Compounds

WB JEE 2019

Compounds with spin only magnetic moment equivalent to five unpaired electrons are

A

K₄[Mn(CN)₆]

B

[Fe(H₂O)₆]Cl₃

C

K₃[FeF₆]

D

K₄[MnF₆]

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6

2019 · Chemistry · Inorganic Chemistry · Coordination Compounds

WB JEE 2019

The conductivity measurement of a coordination compound of cobalt (III) shows that it dissociates into 3 ions in solution. The compound is

A

hexaamminecobalt (III) chloride

B

pentaamminesulphatocobalt (III) chloride

C

pentaamminechloridocobalt (III) sulphate

D

pentaamminechlkoridocobalt(III) chloride

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7

2020 · Chemistry · Inorganic Chemistry · Coordination Compounds

WB JEE 2020

Indicate the correct IUPAC name of the coordination compound shown in the figure.

A

Cis-dichlorotetraminochromium (III) chloride

B

Trans-dichlorotetraminochromium (III) chloride

C

Trans-tetraminedichlorochromium (III) chloride

D

Cis-tetraamminedichlorochromium (III) chloride

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8

2021 · Chemistry · Inorganic Chemistry · Coordination Compounds

WB JEE 2021

Indicate the number of unpaired electrons in K₃[Fe(CN)₆] and K₄[Fe(CN)₆].

A

\({K_3}[Fe{(CN)_6}]\)	\({K_4}[Fe{(CN)_6}]\)
1	0

B

\({K_3}[Fe{(CN)_6}]\)	\({K_4}[Fe{(CN)_6}]\)
5	6

C

\({K_3}[Fe{(CN)_6}]\)	\({K_4}[Fe{(CN)_6}]\)
6	5

D

\({K_3}[Fe{(CN)_6}]\)	\({K_4}[Fe{(CN)_6}]\)
0	1

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9

2021 · Chemistry · Inorganic Chemistry · Coordination Compounds

WB JEE 2021

A solution is made by a concentrated solution of Co(NO₃)₂ with a concentrated solution of NaNO₂ is 50% acetic acid. A solution of a salt containing metal M is added to the mixture, when a yellow precipitate is formed. Metal 'M' is

A

magnesium

B

sodium

C

potassium

D

zinc

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10

2021 · Chemistry · Inorganic Chemistry · Coordination Compounds

WB JEE 2021

Which of the following compounds have magnetic moment identical with [Cr(H₂O)₆]³⁺ ?

A

[Cu(H₂O)₆]²⁺

B

[Mn(H₂O)₆]³⁺

C

[Fe(H₂O)₆]³⁺

D

[Mn(H₂O)₆]⁴⁺

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11

2022 · Chemistry · Inorganic Chemistry · Coordination Compounds

WB JEE 2022

Choose the correct statement for the [Ni(CN)₄]^2\(-\) complex ion (Atomic no. of Ni = 28)

A

The complex is square planar and paramagnetic.

B

The complex is tetrahedral and diamagnetic.

C

The complex is square planar and diamagnetic.

D

The complex is tetrahedral and paramagnetic.

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12

2022 · Chemistry · Inorganic Chemistry · Coordination Compounds

WB JEE 2022

Sodium nitroprusside is :

A

\(N{a_4}[Fe{(CN)_5}N{O_2}]\)

B

\(N{a_2}[Fe{(CN)_5}NO]\)

C

\(N{a_3}[Fe{(CN)_5}NO]\)

D

\(N{a_4}[Fe{(CN)_5}N{O_3}]\)

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13

2023 · Chemistry · Inorganic Chemistry · Coordination Compounds

WB JEE 2023

Nickel combines with a uninegative monodentate ligand (X\(^-\)) to form a paramagnetic complex [NiX\(_4\)]\(^{2-}\). The hybridisation involved and number of unpaired electrons present in the complex are respectively

A

sp\(^3\), two

B

dsp\(^2\), zero

C

dsp\(^2\), one

D

sp\(^3\), one

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14

2023 · Chemistry · Inorganic Chemistry · Coordination Compounds

WB JEE 2023

Which of the following statements is incorrect?

A

\({[V{F_6}]^{3 - }}\) is paramagnetic with 2 unpaired electrons.

B

\({[CuC{l_4}]^{2 - }}\) is paramagnetic with 1 unpaired electron.

C

\({[Co{(N{H_3})_6}]^{3 + }}\) is diamagnetic

D

\({[Co{F_6}]^{3 - }}\) is paramagnetic with 2 unpaired electrons.

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15

2023 · Chemistry · Inorganic Chemistry · Coordination Compounds

WB JEE 2023

The calculated spin-only magnetic moment values in BM for \(\mathrm{[FeCl_4]^-}\) and \(\mathrm{[Fe(CN)_6]^{3-}}\) are

A

5.9 BM, 1.732 BM

B

4.89 BM, 1.732 BM

C

3.87 BM, 1.732 BM

D

1.732 BM, 2.82 BM

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16

2023 · Chemistry · Inorganic Chemistry · Coordination Compounds

WB JEE 2023

The correct statement about the magnetic properties of \({\left[ {Fe{{(CN)}_6}} \right]^{3 - }}\) and \({\left[ {Fe{F_6}} \right]^{3 - }}\) is

A

Both are paramagnetic

B

Both are diamagnetic

C

\({\left[ {Fe{{(CN)}_6}} \right]^{3 - }}\) is diamagnetic, \({\left[ {Fe{F_6}} \right]^{3 - }}\) is paramagnetic

D

\({\left[ {Fe{{(CN)}_6}} \right]^{3 - }}\) is paramagnetic, \({\left[ {Fe{F_6}} \right]^{3 - }}\) is diamagnetic

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17

2024 · Chemistry · Inorganic Chemistry · Coordination Compounds

WB JEE 2024

Which of the following ion/ions is/are diamagnetic ?

A

\(\left[\mathrm{CoF}_6\right]^{3-}\)

B

\(\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{3+}\)

C

\(\left[\mathrm{Fe}\left(\mathrm{OH}_2\right)_6\right]^{2+}\)

D

\(\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{4-}\)

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18

2025 · Chemistry · Inorganic Chemistry · Coordination Compounds

WB JEE 2025

Identify 'P' and 'Q' in the following reaction

A

$\mathrm{P}=\mathrm{K}_2\left[\mathrm{Cd}(\mathrm{CN})_4\right], \mathrm{Q}=\mathrm{CdS}$

B

$\mathrm{P}=\mathrm{CdS}, \mathrm{Q}=\mathrm{K}_2\left[\mathrm{Cd}(\mathrm{CN})_4\right]$

C

$\mathrm{P}=\mathrm{Cd}\left(\mathrm{NO}_3\right)_2, \mathrm{Q}=\mathrm{CdSO}_4$

D

$\mathrm{P}=\left[\mathrm{Cd}\left(\mathrm{OH}_2\right)_4\right]\left(\mathrm{NO}_3\right)_2, \mathrm{Q}=\left[\mathrm{Cd}\left(\mathrm{NO}_3\right)_4\right]\left(\mathrm{NO}_3\right)_2$

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19

2025 · Chemistry · Inorganic Chemistry · Coordination Compounds

VITEEE 2025

Which of the following complex ions is expected to appear colourless in aqueous solution?

A

$\left[\mathrm{Zn}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2+}$

B

$\left[\mathrm{Fe}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{3+}$

C

$\left[\mathrm{Cu}\left(\mathrm{NH}_3\right)_4\right]^{2+}$

D

$\left[\mathrm{CoCl}_4\right]^{2-}$

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20

2025 · Chemistry · Inorganic Chemistry · Coordination Compounds

VITEEE 2025

Which of the following complexes can show both facial ( $f a c$ ) and meridional (mer) isomerism?

A

$\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_3 \mathrm{Cl}_3\right]$

B

$\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{3-}$

C

$\left[\mathrm{Cr}\left(\mathrm{H}_2 \mathrm{O}\right)_3 \mathrm{Cl}_3\right]$

D

$\left[\mathrm{Ni}(\mathrm{CO})_4\right]$

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