Chemistry · Textbook solutions

Coordination Compounds

Every solved example, exercise, and miscellaneous question, in the order the textbook teaches them. Plus every board question asked from this chapter. · 33 questions

9. Coordination Compounds — worked examples

1 q

Solved Examples

Worked · 1

Solved Ex.9.1 $\mathrm{CoCl_3}$

Exercises

32 q

1. Choose the most correct option.

Practice · 7

Choose the most correct option.
Ex Q.1 (i) $\mathrm{[Co(NH_3)_5Br]SO_4}$
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Ex Q.1 (ii) $\mathrm{[Pt(en)_2(SCN)_2]^{2+}}$
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Ex Q.1 (iii) $Formula for the compound sodium hexacynoferrate (III) is$
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Ex Q.1 (v) $\mathrm{[Co(en)_2Cl_2]^{\oplus}}$
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Ex Q.1 (vi) $\mathrm{[CrF_6]^{3\ominus}}$
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Ex Q.1 (vii) $\mathrm{AgNO_3}$
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Ex Q.1 (viii) $\mathrm{[M(en)_2C_2O_4]Cl}$
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2. Answer the following in one or two sentences.

Practice · 7

Answer the following in one or two sentences.
Ex Q.2 (i) $Write the formula for tetraammineplatinum (II) chloride.$
Ex Q.2 (ii) $\mathrm{[Cr(en)_2(H_2O)_2]^{3+}}$
Ex Q.2 (iv) $\mathrm{[PtCl_2(NH_3)_2]}$
Ex Q.2 (v) $What is the shape of a complex in which the coordination number of central metal ion is 4 ?$
Ex Q.2 (vi) $\mathrm{[CoF_6]}$
Ex Q.2 (vii) $\mathrm{[Cu(NH_3)_4][PtCl_4]}$
Ex Q.2 (viii) $Mention two applications of coordination compounds.$

3. Answer in brief.

Practice · 10

Answer in brief.
Ex Q.3 (i) $What are bidentate ligands ? Give one example.$
Ex Q.3 (ii) $\mathrm{[Pt(NH_3)Cl_5]^{\ominus}}$
Ex Q.3 (iii) $What is the difference between a double salt and a complex ? Give an example.$
Ex Q.3 (iv) $\mathrm{[Cu(NH_3)_4]SO_4}$
Ex Q.3 (v) $Write formulae of the following complexes a. Potassium amminetrichloroplatinate (II) b. Dicyanoaurate (I) ion$
Ex Q.3 (vi) $What are ionization isomers ? Give an example.$
Ex Q.3 (vii) $What are the high-spin and low-spin complexes ?$
Ex Q.3 (viii) $\mathrm{[CoCl_4]^{2\ominus}}$
Ex Q.3 (ix) $What are strong field and weak field ligands ? Give one example of each.$
Ex Q.3 (x) $\mathrm{[Cr(en)_3]^{3\oplus}}$

4. Answer the following questions.

Practice · 8

Answer the following questions.
Ex Q.4 (i) $\mathrm{[VCl_4]^{\ominus}}$
Ex Q.4 (ii) $\mathrm{[Fe(CN)_6]^{4\ominus}}$
Ex Q.4 (iii) $\mathrm{[Pt(NH_3)_2ClNO_2]}$
Ex Q.4 (iv) $\mathrm{[Pt(en)_3]^{4\oplus}}$
Ex Q.4 (v) $What are ligands ? What are their types ? Give one example of each type.$
Ex Q.4 (vi) $What are cationic, anionic and neutral complexes? Give one example of each.$
Ex Q.4 (vii) $How stability of the coordination compounds can be explained in terms of equilibrium constants ?$
Ex Q.4 (viii) $Name the factors governing the equilibrium constants of the coordination compounds.$

What the board has asked from this chapter

Questions per paper · 18 papers · 2014 to 2026

June 2026

4 q

Answer the following questions :
Q.2.ii $\mathrm{[Ni(Cl)_4]^{2-}}$
Terms Used in Coordination Chemistry
Q. 12(ii) $Write the representation of sodium hexacyanoferrate (III) complex.$
IUPAC Nomenclature of Coordination Compounds
Q. 21 $\mathrm{[CoF_6]^{3-}}$
Theories of Bonding in Complexes
Q. 27(i) $Define : (i) Co-ordination numbers (ii) Ambidentate ligand$
Terms Used in Coordination Chemistry

February 2026

5 q

Select and write the correct answer for the following multiple choice type of questions :
Q.1.vii $\mathrm{[Co(NH_3)_5(NO_2)]^{2+}}$
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Isomerism in Coordination Compounds
Q. 5 $Explain Homoleptic and Heteroleptic complexes with example.$
Classification of Complexes
Q. 20(i) $Write examples of coordination metal complexes in biology.$
Applications of Coordination Compounds
Q. 23(i) $Write the postulates of Werner's theory of co-ordination complexes.$
Terms Used in Coordination Chemistry
Q. 29(i) $\mathrm{Fe^{2+}}$
Terms Used in Coordination Chemistry

July 2025

4 q

Answer the following questions :
Q.2.vii $\mathrm{[Fe(CN)_6]^{4-}}$
Terms Used in Coordination Chemistry
Q. 11 $\mathrm{[Cu(NH_3)_4]^{2+}}$
IUPAC Nomenclature of Coordination Compounds
Q. 21 $-$
Theories of Bonding in Complexes
Q. 30(i) $Define Co-ordination number.$
Terms Used in Coordination Chemistry

February 2025

4 q

Select and write the correct answer for the following multiple choice type of questions :
Q.1.iv $\mathrm{AgNO_3}$
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Terms Used in Coordination Chemistry
Q.9 $Explain ionization isomers with suitable example in complexes.$
Isomerism in Coordination Compounds
Answer the following questions :
Q.2.vii $Write the number of donor atoms present in EDTA, during formation of complex.$
Types of Ligands
Q. 20 $\mathrm{[Co(NH_3)_6]^{3+}}$
Theories of Bonding in Complexes

July 2024

4 q

Select and write the correct answer for the following multiple choice type of questions :
Q.1.viii $Neutral complex in the following is _____$
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Classification of Complexes
Answer the following questions :
Q.2.iv $\mathrm{Na_3[AlF_6]}$
IUPAC Nomenclature of Coordination Compounds
Q. 17 $Write one example of each of ionisation, linkage and hydrated isomerism.$
Isomerism in Coordination Compounds
Q. 31 $\mathrm{[Co(NH_3)_6]^{3+}}$
Theories of Bonding in Complexes

February 2024

4 q

Answer the following questions :
Q.2.iv $\mathrm{[Co(NH_3)_6]^{3+}}$
Terms Used in Coordination Chemistry
Select and write the correct answer for the following multiple choice type of questions :
Q.1.v $The correct structure of complex having IUPAC name sodium hexanitrocobaltate (III) is$
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IUPAC Nomenclature of Coordination Compounds
Q. 31(i) $\mathrm{[NiCl_4]^{2-}}$
Theories of Bonding in Complexes
Q.22 $Write postulates of Werner theory of co-ordination complexes. Write the name of a hexadentate ligand.$
Terms Used in Coordination Chemistry

March 2023

5 q

Select and write the correct answer for the following multiple choice type of questions:
Q.1.v $The correct formula of a complex having IUPAC name Tetraamminedibromoplatinum (IV) bromide is ______.$
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IUPAC Nomenclature of Coordination Compounds
Answer the following questions:
Q.2.iv $Write the chemical composition of cryolite.$
Applications of Coordination Compounds
Q. 30(i) $\mathrm{[Co(NH_3)_4Cl_2]^{+}}$
Isomerism in Coordination Compounds
Answer the following questions:
Q.2.v $Write the name of platinum complex used in the treatment of cancer.$
Applications of Coordination Compounds
Q. 22 $\mathrm{[CoF_6]^{3-}}$
Theories of Bonding in Complexes

March 2022

3 q

Q.1.v $\text{III}$
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IUPAC Nomenclature of Coordination Compounds
Q.21 $Explain cationic, anionic and neutral sphere complexes with example.$
Classification of Complexes
Q.21 $\text{Ti}^{4 +}$
Theories of Bonding in Complexes

February 2020

3 q

Q.1.iv $35$
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Terms Used in Coordination Chemistry
Q.18 $\text{E.A.N.}$
Isomerism in Coordination Compounds
Q.18 $\left\lbrack \text{Cu}\left( \text{NH}_{3} \right)_{4} \right\rbrack^{2 +}.\ \lbrack Z\ of\ Cu\ = 29\rbrack$
Isomerism in Coordination Compounds

March 2019

1 q

Q.20 $\text{Z} = 29$
Terms Used in Coordination Chemistry

March 2018

3 q

Q.7.iv $\text{copper}\left( \text{II} \right)$
IUPAC Nomenclature of Coordination Compounds
Q.6.ii $\left\lbrack \text{Co}\left( \text{NH}_{3} \right)_{6} \right\rbrack^{3 +}$
Theories of Bonding in Complexes
Q.5.iii $The ligand diethylenetriamine is _____.$
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Types of Ligands

March 2017

2 q

Q.7.i $\text{EAN}$
Terms Used in Coordination Chemistry
Q.1.iii $\text{Fe}^{2 +}$
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Applications of Coordination Compounds

March 2016

2 q

Q.6.iii $\text{Tetraamminedichloroplatinum(IV) chloride}$
IUPAC Nomenclature of Coordination Compounds
Q.6.ii $Explain the term: a. Optical activity b. Ligand c. Interstitial compounds$
Terms Used in Coordination Chemistry

March 2015

3 q

Q.7.i $\left\lbrack \text{Co}\text{F}_{6} \right\rbrack^{3 -}$
Theories of Bonding in Complexes
Q.5.ii $Which of the following complexes will give a white precipitate on treatment with a solution of barium nitrate?$
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Isomerism in Coordination Compounds
Q.5.iii $What is the geometry of chromate ion?$
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Terms Used in Coordination Chemistry

March 2014

2 q

Q.6.iv $\text{EAN}$
Terms Used in Coordination Chemistry
Q.8.i $\text{IUPAC}$
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IUPAC Nomenclature of Coordination Compounds

The 10 board questions to practise first

The questions the board asked again come first, most asked first. Each one says how often and when.

Question 1
Asked 3 times: Mar 2015, Mar 2023, Jun 2026
Q. 21 $\mathrm{[CoF_6]^{3-}}$
Question 2
Asked 3 times: Mar 2018, Jul 2024, Feb 2025
Q. 20 $\mathrm{[Co(NH_3)_6]^{3+}}$
Question 3
Asked 2 times: Mar 2022, Jun 2026
Q. 12(ii) $Write the representation of sodium hexacyanoferrate (III) complex.$
Question 4
Asked 2 times: Jul 2025, Jun 2026
Q. 27(i) $Define : (i) Co-ordination numbers (ii) Ambidentate ligand$
Question 5
Asked 2 times: Feb 2024, Feb 2026
Q. 23(i) $Write the postulates of Werner's theory of co-ordination complexes.$
Question 6
Asked 2 times: Jul 2024, Jul 2025
Q. 11 $\mathrm{[Cu(NH_3)_4]^{2+}}$
Question 7
Asked 2 times: Mar 2019, Feb 2020
Q.18 $\text{E.A.N.}$
Question 8
This type asked 5 times: Mar 2014, Mar 2017, Feb 2020, Feb 2024, Feb 2026. This one: Feb 2026
Q. 29(i) $\mathrm{Fe^{2+}}$
Question 9
This type asked 5 times: Mar 2015, Feb 2020, Jul 2024, Feb 2025, Feb 2026. This one: Feb 2026
Select and write the correct answer for the following multiple choice type of questions :
Q.1.vii $\mathrm{[Co(NH_3)_5(NO_2)]^{2+}}$
Tap an option to check your answer.
Question 10
This type asked 5 times: Mar 2014, Mar 2016, Mar 2018, Mar 2023, Feb 2024. This one: Feb 2024
Select and write the correct answer for the following multiple choice type of questions :
Q.1.v $The correct structure of complex having IUPAC name sodium hexanitrocobaltate (III) is$
Tap an option to check your answer.