Solution of Chapter 9. Coordination Compounds (Chemistry - Exemplar Book)

Which of the following complexes formed by Cu²⁺ ions is most stable?

The colour of the coordination compounds depends on the crystal field splitting. What will be the correct order of absorption of wavelength of light in the visible region, for the complexes, [Co(NH₃)₆]³⁺, [Co(CN)₆]^3–, [Co(H₂O)₆]³⁺

When 0.1 mol CoCl₃(NH₃)₅ is treated with excess of AgNO₃, 0.2 mol of AgCl are obtained. The conductivity of solution will correspond to

When 1 mol CrCl₃.6H₂O is treated with excess of AgNO₃, 3 mol of AgCl are obtained. The formula of the complex is :

The correct IUPAC name of [Pt(NH₃)₂Cl₂] is

The stabilisation of coordination compounds due to chelation is called the chelate effect. Which of the following is the most stable complex species?

Indicate the complex ion which shows geometrical isomerism.

The CFSE for octahedral [CoCl₆]^4– is 18,000 cm^–1. The CFSE for tetrahedral [CoCl₄]^2– will be

Due to the presence of ambidentate ligands coordination compounds show isomerism. Palladium complexes of the type [Pd(C₆H₅)₂(SCN)₂] and [Pd(C₆H₅)₂(NCS)₂] are

The compounds [Co(SO₄)(NH₃)₅]Br and [Co(SO₄)(NH₃)₅]Cl represent

A chelating agent has two or more than two donor atoms to bind to a single metal ion. Which of the following is not a chelating agent?

Which of the following species is not expected to be a ligand?

What kind of isomerism exists between [Cr(H₂O)₆]Cl₃ (violet) and [Cr(H₂O)₅Cl]Cl₂.H₂O (greyish-green)?

IUPAC name of [Pt (NH₃)₂Cl(NO₂)] is :

Atomic number of Mn, Fe and Co are 25, 26 and 27 respectively. Which of the following inner orbital octahedral complex ions are diamagnetic?

Atomic number of Mn, Fe, Co and Ni are 25, 26 27 and 28 respectively.

Which of the following outer orbital octahedral complexes have same number of unpaired electrons?

Which of the following options are correct for [Fe(CN)₆]^3– complex?

An aqueous pink solution of cobalt(II) chloride changes to deep blue on the addition of excess of HCl. This is because____________.

Which of the following complexes are homoleptic?

Which of the following complexes are heteroleptic?

Identify the optically active compounds from the following :

Identify the correct statements for the behaviour of ethane-1, 2-diamine as a ligand.

Which of the following complexes show linkage isomerism?

Arrange the following complexes in the increasing order of conductivity of

their solution: [Co(NH3)3Cl3], [Co(NH3)4Cl2] Cl, [Co(NH3)6]Cl3 , [Cr(NH3)5Cl]Cl2

A coordination compound CrCl3.4H2O precipitates silver chloride when treated

with silver nitrate. The molar conductance of its solution corresponds to a

total of two ions. Write structural formula of the compound and name it.

A complex of the type [M(AA)2X2]n+is known to be optically active. What does this indicate about the structure of the complex? Give one example of such complex.

Magnetic moment of [MnCl4]2– is 5.92 BM. Explain giving reason.

On the basis of crystal field theory explain why Co(III) forms paramagnetic octahedral complex with weak field ligands whereas it forms diamagnetic octahedral complex with strong field ligands.

Why are low spin tetrahedral complexes not formed?

Give the electronic configuration of the following complexes on the basis of

Crystal Field Splitting theory.

[CoF6]3–, [Fe(CN)6]4– and [Cu(NH3)6]2+.

Explain why [Fe(H2O)6]3+ has magnetic moment value of 5.92 BM whereas

[Fe(CN)6]3– has a value of only 1.74 BM.

Arrange following complex ions in increasing order of crystal field splitting

energy (DO) :

[Cr(Cl)6]3–, [Cr(CN)6]3–, [Cr(NH3)6]3+.

Why do compounds having similar geometry have different magnetic moment?

CuSO4.5H2O is blue in colour while CuSO4 is colourless. Why?

Name the type of isomerism when ambidentate ligands are attached to central

metal ion. Give two examples of ambidentate ligands.

Match the complexions given in Column I with the colours given in Column IIand assign the correct code:

Code:

Match the coordination compounds given in Column I with the central metalatoms given in Column II and assign the correct code:

Code:

Match the complex ions given in Column I with the hybridisation and numberof unpaired electrons given in Column II and assign the correct code:

Code:

Match the complex species given in Column I with the possible isomerismgiven in Column II and assign the correct code :

Column I (Complex species) Column II (Isomerism)

Code:

Match the compounds given in Column I with the oxidation state of cobalt present in it (given in Column II) and assign the correct code.

Code:

Note: In the following questions a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.

Assertion: Toxic metal ions are removed by the chelating ligands.

Reason: Chelate complexes tend to be more stable.

Note: In the following questions a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.

Assertion: [Cr(H₂O)₆]Cl₂ and [Fe(H₂O)₆]Cl₂ are reducing in nature.

Reason: Unpaired electrons are present in their d-orbitals.

Note: In the following questions a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.

Assertion: Linkage isomerism arises in coordination compounds containing ambidentate ligand.

Reason: Ambidentate ligand has two different donor atoms.

Note: In the following questions a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.

Assertion: Complexes of MX₆ and MX₅L type (X and L are unidentate) do not show geometrical isomerism.

Reason: Geometrical isomerism is not shown by complexes of coordination number 6.

Note: In the following questions a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.

Assertion: [Fe(CN)₆]^3– ion shows magnetic moment corresponding to twounpaired electrons.

Reason: Because it has d²sp³ type hybridisation.

Using crystal field theory, draw energy level diagram, write the electronic configuration of the central metal atom/ion and determine the magnetic moment value in the following:

(i) [CoF₆]^3–, [Co(H₂O)₆]²⁺ , [Co(CN)₆]^3–

(ii) [FeF₆]^3–, [Fe(H₂O)₆]²⁺, [Fe(CN)₆]^4–

Using valence bond theory, explain the following in relation to the complexes given below:

[Mn(CN)₆]^3– , [Co(NH₃)₆]³⁺, [Cr(H₂O)₆]³⁺ , [FeCl₆]^4–

(i) Type of hybridisation.

(ii) Inner or outer orbital complex.

(iii) Magnetic behaviour.

(iv Spin only magnetic moment value.

CoSO₄Cl.5NH₃ exists in two isomeric forms ‘A’ and ‘B’. Isomer ‘A’ reacts withAgNO₃ to give white precipitate but does not react with BaCl₂. Isomer ‘B’ gives a white precipitate with BaCl₂ but does not react with AgNO₃. Answer the following questions.

(i) Identify ‘A’ and ‘B’ and write their structural formulas.

(ii) Name the type of isomerism involved.

(iii) Give the IUPAC name of ‘A’ and ‘B’.

What is the relationship between the observed colour of the complex and thewavelength of light absorbed by the complex?

Why are different colours observed in octahedral and tetrahedral complexesfor the same metal and same ligands?