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NCERT solutions for Chemistry [English] Class 12 chapter 9 - Coordinate Compounds [Latest edition]

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Solutions for Chapter 9: Coordinate Compounds

Below listed, you can find solutions for Chapter 9 of CBSE, Karnataka Board PUC NCERT for Chemistry [English] Class 12.


Intext QuestionsExercises
Intext Questions [Pages 244 - 256]

NCERT solutions for Chemistry [English] Class 12 9 Coordinate Compounds Intext Questions [Pages 244 - 256]

Intext Questions | Q 1.1 | Page 244

Write the formula for the given coordination compound:

Tetraamminediaquacobalt (III) chloride

Intext Questions | Q 1.2 | Page 244

Write the formula for the given coordination compound:

Potassium tetracyanidonickelate (II)

Intext Questions | Q 1.3 | Page 244

Write the formula for the given coordination compound:

Tris(ethane−1, 2−diamine) chromium (III) chloride

Intext Questions | Q 1.4 | Page 244

Write the formula for the given coordination compound:

Amminebromidochloridonitrito-N-platinate (II)

Intext Questions | Q 1.5 | Page 244

Write the formula for the given coordination compound:

Dichloridobis(ethane−1, 2−diamine)platinum (IV) nitrate

Intext Questions | Q 1.6 | Page 244

Write the formula for the given coordination compound:

Iron (III) hexacyanoferrate (II)

Intext Questions | Q 2.1 | Page 244

Write the IUPAC name of the following coordination compound:

[Co(NH3)6]Cl3

Intext Questions | Q 2.2 | Page 244

Write the IUPAC name of the following coordination compound:

[Co(NH3)5Cl]Cl2

Intext Questions | Q 2.3 | Page 244

Write the IUPAC names of the following coordination compounds : K3[Fe(CN)6]

Intext Questions | Q 2.5 | Page 244

Write the IUPAC name of the following coordination compound:

 K2[PdCl4]

Intext Questions | Q 2.6 | Page 244

Write the IUPAC name of the following coordination compound:

[Pt(NH3)2Cl(NH2CH3)]Cl

Intext Questions | Q 3.1 | Page 247

Indicate the types of isomerism exhibited by the following complex and draw the structures for these isomers:

K[Cr(H2O)2(C2O4)2]

Intext Questions | Q 3.2 | Page 247

Indicate the types of isomerism exhibited by the following complex and draw the structures for these isomers:

[Co(en)3]Cl3

Intext Questions | Q 3.3 | Page 247

Indicate the types of isomerism exhibited by the following complex and draw the structures for these isomers:

[Co(NH3)5(NO2)](NO3)2

Intext Questions | Q 3.4 | Page 247

Indicate the types of isomerism exhibited by the following complex and draw the structure for this isomer:

[Pt(NH3)(H2O)Cl2]

Intext Questions | Q 4 | Page 247

Give evidence that [Co(NH3)5Cl]SO4 and [Co(NH3)5SO4]Cl are ionization isomers.

Intext Questions | Q 5 | Page 254

Explain on the basis of valence bond theory that [Ni(CN)4]2− ion with square planar structure is diamagnetic and the [NiCl4]2− ion with tetrahedral geometry is paramagnetic.

Intext Questions | Q 6 | Page 254

[NiCl4]2− is paramagnetic while [Ni(CO)4] is diamagnetic though both are tetrahedral. Why?

Intext Questions | Q 7 | Page 254

[Fe(H2O)6]3+ is strongly paramagnetic whereas [Fe(CN)6]3− is weakly paramagnetic. Explain.

Intext Questions | Q 8 | Page 254

Explain [Co(NH3)6]3+ is an inner orbital complex whereas [Ni(NH3)6]2+ is an outer orbital complex.

Intext Questions | Q 9 | Page 254

Predict the number of unpaired electrons in the square planar [Pt(CN)4]2− ion.

Intext Questions | Q 10 | Page 254

The hexaquo manganese (II) ion contains five unpaired electrons, while the hexacyanoion contains only one unpaired electron. Explain using Crystal Field Theory.

Intext Questions | Q 11 | Page 256

Calculate the overall complex dissociation equilibrium constant for the Cu(NH3)42+ ion, given that β4 for this complex is 2.1 × 1013.

Exercises [Pages 258 - 260]

NCERT solutions for Chemistry [English] Class 12 9 Coordinate Compounds Exercises [Pages 258 - 260]

Exercises | Q 1 | Page 258

Explain the bonding in coordination compounds in terms of Werner’s postulates.

Exercises | Q 2 | Page 258

FeSO4 solution mixed with (NH4)2SO4 solution in 1 : 1 molar ratio gives the test of Fe2+ ion but CuSO4 solution mixed with aqueous ammonia in 1 : 4 molar ratio does not give the test of Cu2+ ion. Explain why?

Exercises | Q 3 | Page 258

Explain the following, giving two examples:

Coordination entity

Exercises | Q 4. 1. a | Page 258

What is meant by unidentate ligand?

Exercises | Q 4. 1. b | Page 258

Give two examples of unidentate ligand.

Exercises | Q 4. 2. a | Page 258

What is meant by didentate ligand?

Exercises | Q 4. 2. b | Page 258

Give two examples of didentate ligand.

Exercises | Q 4. 3. a | Page 258

What is meant by ambidentate ligand?

Exercises | Q 4. 3. b | Page 258

Give two examples of ambidentate ligand.

Exercises | Q 5.1 | Page 258

Specify the oxidation number of the metal in the following coordination entity:

[Co(H2O)(CN)(en)2]2+

Exercises | Q 5.2 | Page 258

Specify the oxidation number of the metal in the following coordination entity:

[CoBr2(en)2]+

Exercises | Q 5.3 | Page 258

Specify the oxidation number of the metal in the following coordination entity:

[PtCl4]2−

Exercises | Q 5.4 | Page 258

Specify the oxidation number of the metal in the following coordination entity:

K3[Fe(CN)6]

Exercises | Q 5.5 | Page 258

Specify the oxidation number of the metal in the following coordination entity:

[Cr(NH3)3Cl3]

Exercises | Q 6.1 | Page 258

Using IUPAC norms, write the formula for the following:

Tetrahydroxidozincate(II)

Exercises | Q 6.2 | Page 258

Using IUPAC norms, write the formula for the following:

Potassium tetrachloridopalladate(II)

Exercises | Q 6.3 | Page 258

Using IUPAC norms, write the formula for the following:

Diamminedichloridoplatinum(II)

Exercises | Q 6.5 | Page 258

Write the formula for the following complex:

Pentaamminenitrito-O-Cobalt (III)

Exercises | Q 6.6 | Page 258

Using IUPAC norms, write the formula for the following: 

Hexaamminecobalt(III) sulphate

Exercises | Q 6.7 | Page 258

Using IUPAC norms, write the formula for the following:

Potassium tri(oxalato)chromate(III)

Exercises | Q 6.9 | Page 258

Using IUPAC norms, write the formula for the following:

Tetrabromidocuprate(II)

Exercises | Q 7.1 | Page 258

Using IUPAC norms write the systematic name of the following:

[Co(NH3)6]Cl3

Exercises | Q 7.2 | Page 258

Using IUPAC norms write the systematic name of the following:

[Pt(NH3)2Cl(NH2CH3)]Cl

Exercises | Q 7.3 | Page 258

Using IUPAC norms, write the systematic name of the following:

[Ti(H2O)6]3+

Exercises | Q 7.4 | Page 258

Using IUPAC norms, write the systematic name of the following:

[Co(NH3)4Cl(NO2)]Cl

Exercises | Q 7.5 | Page 258

Using IUPAC norms, write the systematic name of the following:

[Mn(H2O)6]2+

Exercises | Q 7.6 | Page 258

Using IUPAC norms, write the systematic name of the following:

[NiCl4]2−

Exercises | Q 7.7 | Page 258

Using IUPAC norms, write the systematic name of the following:

[Ni(NH3)6]Cl2

Exercises | Q 7.8 | Page 258

Using IUPAC norms, write the systematic name of the following:

[Co(en)3]3+

Exercises | Q 7.9 | Page 258

Using IUPAC norms, write the systematic name of the following:

[Ni(CO)4]

Exercises | Q 8 | Page 258

List various types of isomerism possible for coordination compounds, giving an example of each.

Exercises | Q 9.1 | Page 258

How many geometrical isomers are possible in the following coordination entity? 

[Cr(C2O4)3]3−

Exercises | Q 9.2 | Page 258

How many geometrical isomers are possible in the following coordination entity? 

[Co(NH3)3Cl3]

Exercises | Q 10.1 | Page 258

Draw the structure of optical isomers of [Cr(C2O4)3]3−.

Exercises | Q 10.2 | Page 258

Draw the structure of optical isomers of [PtCl2(en)2]2+.

Exercises | Q 10.3 | Page 258

Draw the structure of optical isomers of [Cr(NH3)2Cl2(en)]+.

Exercises | Q 11.1 | Page 259

Draw all the isomers (geometrical and optical) of [CoCl2(en)2]+.

Exercises | Q 11.2 | Page 259

Draw all the isomers (geometrical and optical) of [Co(NH3)Cl(en)2]2+.

Exercises | Q 11.3 | Page 259

Draw all the isomers (geometrical and optical) of [Co(NH3)2Cl2(en)]+.

Exercises | Q 12 | Page 259

Write all the geometrical isomers of [Pt(NH3)(Br)(Cl)(py)] and how many of these will exhibit optical isomers?

Exercises | Q 13 | Page 259

Aqueous copper sulphate solution (blue in colour) gives a green precipitate with aqueous potassium fluoride. Explain this experimental result.

Exercises | Q 14 | Page 259

What is the coordination entity formed when excess of aqueous KCN is added to an aqueous solution of copper sulphate? Why is it that no precipitate of copper sulphide is obtained when H2S(g) is passed through this solution?

Exercises | Q 15.1 | Page 259

Discuss the nature of bonding in the following coordination entity on the basis of valence bond theory:

[Fe(CN)6]4−

Exercises | Q 15.2 | Page 259

Discuss the nature of bonding in the following coordination entity on the basis of valence bond theory:

[FeF6]3−

Exercises | Q 15.3 | Page 259

Discuss the nature of bonding in the following coordination entity on the basis of valence bond theory:

[Co(C2O4)3]3−

Exercises | Q 15.4 | Page 259

Discuss the nature of bonding in the following coordination entity on the basis of valence bond theory:

[CoF6]3−

Exercises | Q 16 | Page 259

Draw figure to show the splitting of d orbitals in an octahedral crystal field.

Exercises | Q 17 | Page 259

What is spectrochemical series? Explain the difference between a weak field ligand and a strong field ligand.

Exercises | Q 18. (i) | Page 259

What is crystal field splitting energy?

Exercises | Q 18. (ii) | Page 259

How does the magnitude of Δ0 decide the actual configuration of d orbitals in a coordination entity?

Exercises | Q 19 | Page 259

[Cr(NH3)6]3+ is paramagnetic while [Ni(CN)4]2− is diamagnetic. Explain why?

Exercises | Q 20 | Page 259

A solution of [Ni(H2O)6]2+ is green but a solution of [Ni(CN)4]2− is colourless. Explain.

Exercises | Q 21 | Page 259

[Fe(CN)6]4− and [Fe(H2O)6]2+ are of different colours in dilute solutions. Why?

Exercises | Q 22 | Page 259

Discuss the nature of bonding in metal carbonyls.

Exercises | Q 23.1 | Page 259

Give the oxidation state, d-orbital occupation and coordination number of the central metal ion in the following complex:

K3[Co(C2O4)3]

Exercises | Q 23.2 | Page 259

Give the oxidation state, d-orbital occupation and coordination number of the central metal ion in the following complex:

cis-[CrCl2(en)2]Cl

Exercises | Q 23.3 | Page 259

Give the oxidation state, d-orbital occupation and coordination number of the central metal ion in the following complex:

(NH4)2[CoF4]

Exercises | Q 23.4 | Page 259

Give the oxidation state, d-orbital occupation and coordination number of the central metal ion in the following complex:

[Mn(H2O)6]SO4

Exercises | Q 24.1 | Page 259

Write down the IUPAC name of the following complex and indicate the oxidation state, electronic configuration and coordination number. Also, give the stereochemistry and magnetic moment of the complex:

K[Cr(H2O)2(C2O4)2].3H2O

Exercises | Q 24.2 | Page 259

Write down the IUPAC name of the following complex and indicate the oxidation state, electronic configuration and coordination number. Also, give the stereochemistry and magnetic moment of the complex:

[Co(NH3)5Cl]Cl2

Exercises | Q 24.3 | Page 259

Write down the IUPAC name of the following complex and indicate the oxidation state, electronic configuration and coordination number. Also, give the stereochemistry and magnetic moment of the complex:

[CrCl3(py)3]

Exercises | Q 24.4 | Page 259

Write down the IUPAC name of the following complex and indicate the oxidation state, electronic configuration and coordination number. Also, give the stereochemistry and magnetic moment of the complex:

Cs[FeCl4]

Exercises | Q 24.5 | Page 259

Write down the IUPAC name of the following complex and indicate the oxidation state, electronic configuration and coordination number. Also, give the stereochemistry and magnetic moment of the complex:

K4[Mn(CN)6]

Exercises | Q 25 | Page 259

What is meant by stability of a coordination compound in solution? State the factors which govern stability of complexes.

Exercises | Q 26, (i) | Page 259

What is meant by the chelate effect?

Exercises | Q 26. (ii) | Page 259

Give an example of chelate effect.

Exercises | Q 27. (i) | Page 259

Discuss briefly, giving an example of the role of coordination compounds in biological systems.

Exercises | Q 27. (ii) | Page 259

Discuss briefly, giving an example of the role of coordination compounds in medicinal chemistry.

Exercises | Q 27. (iii) | Page 259

Discuss briefly, giving an example of the role of coordination compounds in analytical chemistry.

Exercises | Q 27. (iv) | Page 259

Discuss briefly, giving an example of the role of coordination compounds in extraction/metallurgy of metals.

Exercises | Q 28 | Page 259

How many ions are produced from the complex Co(NH3)6Cl2 in solution?

  • 6

  • 4

  • 3

  • 2

Exercises | Q 29 | Page 259

Amongst the following ions, which one has the highest magnetic moment value?

  • [Cr(H2O)6]3+

  • [Fe(H2O)6]2+

  • [Zn(H2O)6]2+

Exercises | Q 30 | Page 259

The oxidation number of cobalt in K[Co(CO)4] is

(i) +1

(ii) +3

(iii) −1

(iv) −3

Exercises | Q 31 | Page 260

Amongst the following, the most stable complex is:

  • [Fe(H2O)6]3+

  • [Fe(NH3)6]3+

  • [Fe(C2O4)3]3−

  • [FeCl6]3−

Exercises | Q 32 | Page 260

What will be the correct order for the wavelengths of absorption in the visible region for the following?

[Ni(NO2)6]4−, [Ni(NH3)6]2+, [Ni(H2O)6]2+

Solutions for 9: Coordinate Compounds

Intext QuestionsExercises

NCERT solutions for Chemistry [English] Class 12 chapter 9 - Coordinate Compounds

Shaalaa.com has the CBSE, Karnataka Board PUC Mathematics Chemistry [English] Class 12 CBSE, Karnataka Board PUC solutions in a manner that help students grasp basic concepts better and faster. The detailed, step-by-step solutions will help you understand the concepts better and clarify any confusion. NCERT solutions for Mathematics Chemistry [English] Class 12 CBSE, Karnataka Board PUC 9 (Coordinate Compounds) include all questions with answers and detailed explanations. This will clear students' doubts about questions and improve their application skills while preparing for board exams.

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Concepts covered in Chemistry [English] Class 12 chapter 9 Coordinate Compounds are Introduction of Coordination Compounds, Definitions of Some Important Terms Pertaining to Coordination Compounds, Nomenclature of Coordination Compounds - Naming of Mononuclear Coordination Compounds, Bonding in Coordination Compounds - Introduction, Werner’s Theory of Coordination Compounds, Valence Bond Theory (VBT), Stereoisomerism, Nomenclature of Coordination Compounds - Formulas of Mononuclear Coordination Entities, Structural Isomerism, Isomerism in Coordination Compounds, Coordination Compounds Numerical, Types of Ligands, Magnetic Properties of Coordination Compounds, Crystal Field Theory (CFT), Colour in Coordination Compounds, Bonding in Metal Carbonyls, Stability of Coordination Compounds, Importance and Applications of Coordination Compounds, Introduction of Coordination Compounds, Definitions of Some Important Terms Pertaining to Coordination Compounds, Nomenclature of Coordination Compounds - Naming of Mononuclear Coordination Compounds, Bonding in Coordination Compounds - Introduction, Werner’s Theory of Coordination Compounds, Valence Bond Theory (VBT), Stereoisomerism, Nomenclature of Coordination Compounds - Formulas of Mononuclear Coordination Entities, Structural Isomerism, Isomerism in Coordination Compounds, Coordination Compounds Numerical, Types of Ligands, Magnetic Properties of Coordination Compounds, Crystal Field Theory (CFT), Colour in Coordination Compounds, Bonding in Metal Carbonyls, Stability of Coordination Compounds, Importance and Applications of Coordination Compounds.

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Get the free view of Chapter 9, Coordinate Compounds Chemistry [English] Class 12 additional questions for Mathematics Chemistry [English] Class 12 CBSE, Karnataka Board PUC, and you can use Shaalaa.com to keep it handy for your exam preparation.

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