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Coordination Compounds Chemistry - Coordination Compounds

Bihar Board (BSEB) - STD 12 Science - Chemistry (BSEB - English Medium). 354 questions in this chapter.

Question types

Coordination Compounds question types

354 questions across 6 question groups — pick any mix to generate a Chemistry paper with step-by-step answer keys.

354
Questions
6
Question groups
5
Question types
Sample Questions

Coordination Compounds questions

One sample from each question group in this chapter. Select any group above to see the full set with answer keys.

Q 3M.C.Q [1M]1 Mark
Pair of compounds which is planar:
  • A
    [Ni(CN)4​]−4, [PtCl4​]−2
  • B
    [NiCl4​]−2, [Ni(CN)4​]−4
  • C
    [Ni(CN)4​​]−4, [Rh(CO)2​(PPh3​)2​]+
  • D
    [PtCl4​]−2, [Ni(CN)4​]−4
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Q 6Assertion (A) & Reason (B) MCQ [1M]1 Mark
Two statements are given- one labelled Assertion (A) and the other labelled Reason (R). Select the correct answer to these questions from the codes (a), (b), (c) and (d) as given below:
  1. Both Assertion (A) and Reason (R) are correct statements, and Reason (R) is the correct explanation of the Assertion (A).
  2. Both Assertion (A) and Reason (R) are correct statements, but Reason (R) is not the correct explanation of the Assertion (A).
  3. Assertion (A) is correct, but Reason (R) is incorrect statement.
  4. Assertion (A) is incorrect, but Reason (R) is correct statement.
Assertion (A): Linkage isomerism arises in coordination compounds because of ambidentate ligand.
Reason (R): Ambidentate ligand like NO2 has two different donor atoms i.e., N and O.
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Q 7Assertion (A) & Reason (B) MCQ [1M]1 Mark
Two statements are given- one labelled Assertion (A) and the other labelled Reason (R). Select the correct answer to these questions from the codes (a), (b), (c) and (d) as given below:
  1. Both Assertion (A) and Reason (R) are correct statements, and Reason (R) is the correct explanation of the Assertion (A).
  2. Both Assertion (A) and Reason (R) are correct statements, but Reason (R) is not the correct explanation of the Assertion (A).
  3. Assertion (A) is correct, but Reason (R) is incorrect statement.
  4. Assertion (A) is incorrect, but Reason (R) is correct statement.
Assertion (A): Linkage isomerism arises in coordination compounds because of ambidentate ligand.
Reason (R): Ambidentate ligand like NO2 has two different donor atoms i.e., N and O.
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Q 8Assertion (A) & Reason (B) MCQ [1M]1 Mark
In these questions, a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.
  1. Assertion and reason both are correct statements and reason is correct explanation for assertion.
  2. Assertion and reason both are correct statements but reason is not correct explanation for assertion.
  3. Assertion is correct statement but reason is wrong statement.
  4. Assertion is wrong statement but reason is correct statement.
Assertion: [Pt(NH3)2Cl2] is square planar.
Reason: The oxidation state of platinum is +2.
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Q 9Assertion (A) & Reason (B) MCQ [1M]1 Mark
In these questions, a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.
  1. Assertion and reason both are correct statements and reason is correct explanation for assertion.
  2. Assertion and reason both are correct statements but reason is not correct explanation for assertion.
  3. Assertion is correct statement but reason is wrong statement.
  4. Assertion is wrong statement but reason is correct statement.
Assertion: The ligands nitro and nitrito are called ambidentate ligands.
Reason: An ambidentate ligand can attach to metal through two different atoms.
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Q 10Assertion (A) & Reason (B) MCQ [1M]1 Mark
In these questions, a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.
  1. Assertion and reason both are correct statements and reason is correct explanation for assertion.
  2. Assertion and reason both are correct statements but reason is not correct explanation for assertion.
  3. Assertion is correct statement but reason is wrong statement.
  4. Assertion is wrong statement but reason is correct statement.
Assertion: [Fe(CN)6]3- is weakly paramagnetic while [Fe(CN)6]4- is diamagnetic.
Reason: [Fe(CN)6]3- has +3 oxidation state while [Fe(CN)6]4- has +2 oxidation state.
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Q 163 Marks Question3 Marks
  1. Using valence bond theory, predict the shape and magnetic character of

[Ni(CO)4]. [Ni = 28].

  1. Give one example of application of coordination compounds-in medicine.
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Q 173 Marks Question3 Marks
  1. For the complex [Fe(H2O)6]3+, write the hybridization, magnetic character and spin of the complex. (At. number: Fe = 26)
  2. Draw one of the geometrical isomers of the complex [Pt(en)2Cl2]2+ which is optically inactive.
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Q 183 Marks Question3 Marks
  1.  What type of isomerism is shown by [Co(NH3)5ONO]Cl2?
  2. On the basis of crystal field theory, write the electronic configuration for d4 ion if $\Delta$ o< P.
  3. Write the hybridization and shape of [Fe(CN)6]3-.

(Atomic number of Fe = 26)

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Q 193 Marks Question3 Marks
  1. What type of isomerism is shown by the complex [Co(NH3)5 (SCN)]2+?
  2. Why is [NiCl4]2- paramagnetic while [Ni(CN)4]2- is diamagnetic? (Atomic number of Ni = 28)
  3. Why are low spin tetrahedral complexes rarely observed?
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Q 203 Marks Question3 Marks
  1. Write the IUPAC name of the complex [Cr(NH3)4 Cl2]Cl.
  2. What type of isomerism is exhibited by the complex [Co(en)3]3+?

(en= ethane-1,2-diamine)

  1. Why is [NiCl4]2–paramagnetic but [Ni(CO)4] is diamagnetic?

(At. nos.: Cr= 24, Co=27, Ni= 28)

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Q 22Long Answer Type Questions [5M]5 Marks
Match the complex ions given in Column I with the hybridisation and number of unpaired electrons given in Column II and assign the correct code:
 
Column I (Complex ion)
 
Column II (Hybridisation, number of unpaired electrons)
a.
[Cr(H2O)6]3+
1.
dsp2, 1
b.
[Co(CN)4]2-
2.
sp3d2, 5
c.
[Ni(NH3)6]2+
3.
d2sp3, 3
d.
[MnF6]4-
4.
sp3, 4
 
 
5.
sp3d2, 2
Code:
  1. A (3), B (1), C (5), D (2).
  2. A (4), B (3), C (2), D (1).
  3. A (3), B (2), C (4), D (1).
  4. A (4), B (1), C (2), D (3).
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Q 23Long Answer Type Questions [5M]5 Marks
Match the complex ions given in Column I with the colours given in Column II and assign the correct code:
 
Column I (Complex ion)
 
Column II (Colour)
a.
[Co(NH3)6]3+
1.
Violet
b.
[Ti(H2O)6]3+
2.
Green
c.
[Ni(H2O)6]2+
3.
Pale blue
d.
[Ni(H2O)4(en)]2+ (aq)
4.
Yellowish orange
 
 
5.
Blue
Code:
  1. A (1), B (2), C (4), D (5).
  2. A (4), B (3), C (2), D (1).
  3. A (3), B (2), C (4), D (1).
  4. A (4), B (1), C (2), D (3).
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Q 24Long Answer Type Questions [5M]5 Marks
Match the coordination compounds given in Column I with the central metal atoms given in Column II and assign the correct code:
 
Column I (Coordination Compound)
 
Column II (Central metal atom)
a.
Chlorophyll
1.
Rhodium
b.
Blood pigment
2.
Cobalt
c.
Wilkinson catalyst
3.
Calcium
d.
Vitamin B12
4.
Iron
 
 
5.
Magnesium
Code:
  1. A (5), B (4), C (1), D (2).
  2. A (3), B (4), C (5), D (1).
  3. A (4), B (3), C (2), D (1).
  4. A (3), B (4), C (1), D (2).
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Q 25Long Answer Type Questions [5M]5 Marks
 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.

 
Column I (Compound)
 
Column II (Oxidation state of Co)
a.
[Co(NCS)(NH3)5](SO3)
1.
+4
b.
[Co(NH3)4Cl2]SO4
2.
0
c.
Na4[Co(S2O3)3]
3.
+1
d.
[Co2(CO)8]
4.
+2
 
 
5.
+3

Code:

  1. A (1), B (2), C (4), D (5).
  2. A (4), B (3), C (2), D (1).
  3. A (5), B (1), C (4), D (2).
  4. A (4), B (1), C (2), D (3).
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Q 26Case study (4 Marks)4 Marks
Read the passage given below and answer the following questions:
Coordination compounds are formulated and named according to the IUPAC system.
Few rules for naming coordination compounds are:
  1. In ionic complex, the cation is named first and then the anion.
  2. In the coordination entity, the ligands are named first and then the central metal ion.
  3. When more than one type of ligands are present, they are named in alphabetical order of preference without any consideration of charge.
The following questions are multiple choice questions. Choose the most appropriate answer:
  1. The IUPAC name of the complex [Pt(NH3)3Br(NO2)Cl]Cl is:
  1. Triamminechlorobromonitroplatinum (IV) chloride.
  2. Triamminebromonitrochloroplatinum (IV) chloride.
  3. Triamminebromidochloridonitroplatinum (IV) chloride.
  4. Triamminenitrochlorobromoplatinum (IV) chloride.
  1. The IUPAC name of [Ni(CO)4] is:
  1. Tetracarbonylnickel (II).
  2. Tetracarbonylnickel (0).
  3. Tetracarbonylnickelate (II).
  4. Tetracarbonylnickelate (0).
  1. As per IUPAC nomenclature, the name of the complex [Co(H2O)4(NH3)2]Cl3 is:
  1. Tetraaquadiamminecobalt (II) chloride.
  2. Tetraaquadiamminecobalt (III) chloride.
  3. Diamminetetraaquacobalt (II) chloride.
  4. Diamminetetraaquacobalt (III) chloride.
  1. Which of the following represents correct formula of dichloridobis(ethane -1, 2-diamine)cobalt (III) ion?
  1. [CoCl2(en)]2+
  2. [CoCl2(en)2]2+
  3. [CoCl2(en)]+
  4. [CoCl2(en)2]+
  1. Correct formula of pentaamminenitro-O-cobalt (III) sulphate is:
  1. [Co(NO2)(NH3)5]SO4
  2. [Co(ONO)(NH3)5]SO4
  3. [Co(NO2)(NH3)4](SO4)2
  4. [Co(ONO)(NH3)4](SO4)2
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Q 27Case study (4 Marks)4 Marks
Read the passage given below and answer the following questions:
To explain bonding in coordination compounds various theories were proposed. One of the important theory was valence bond theory. According to that, the central metal ion in the complex makes available a number of empty orbitals for the formation of coordination bonds with suitable ligands. The appropriate atomic orbitals of the metal hybridise to give a set of equivalent orbitals of definite geometry.
The d-orbitals involved in the hybridisation may be either inner d-orbitals i.e., (n - 1)d or outer d-orbitals i.e., nd. For example, Co3+ forms both inner orbital and outer orbital complexes, with ammonia it forms [Co(NH3)6]3+ and with fluorine it forms [CoF6]3- complex ion.
The following questions are multiple choice questions. Choose the most appropriate answer:
  1. Which of the following is not true for [CoF6]3-?
  1. It is paramagnetic.
  2. It has coordination number of 6.
  3. It is outer orbital complex.
  4. It involves d2sp3 hybridisation.
  1. [Cr(H2O)6]Cl3 (at. no. of Cr = 24) has a magnetic moment of 3.83B.M. The correct distribution of 3d-electrons in the central metal of the complex is:
  1. $3\text{d}^1_\text{xy},3\text{d}^1_{\text{x}^2-\text{y}^2},3\text{d}^1_\text{yz}$
  2. $3\text{d}^1_\text{xy},3\text{d}^1_{\text{yz}},3\text{d}^1_\text{zx}$
  3. $3\text{d}^1_\text{xy},3\text{d}^1_{\text{zy}},3\text{d}^1_{\text{z}^2}$
  4. $3\text{d}^1_{\text{x}^2-\text{y}^2},3\text{d}^1_{\text{z}^2},3\text{d}^1_\text{xz}$
  1. Which of the following is true for [Co(NH3)6]3+?
  1. It is an octahedral, di magnetic and outer orbital complex.
  2. It is an octahedral, paramagnetic and outer orbital complex.
  3. It is an octahedral, paramagnetic and inner orbital complex.
  4. It is an octahedral, di magnetic and inner orbital complex.
  1. The paramagnetism of [CoF6]3- is due to.
  1. 3 electrons.
  2. 4 electrons.
  3. 2 electrons.
  4. 1 electron.
  1. Which of the following is an inner orbital or low spin complex?
  1. [Ni(H2O)6]3+
  2. [FeF6]3-
  3. [Co(CN)6]3-
  4. [NiCl4]2-
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Q 28Case study (4 Marks)4 Marks
Read the passage given below and answer the following questions:

Werner, a Swiss chemist in 1892 prepared and characterised a large number of coordination compounds and studied their physical and chemical behaviour. He proposed that, in coordination compounds, metals possess two types of valencies, viz. primary valencies, which are normally ionisable and secondary valencies which are non-ionisable. ln a series of compounds of cobalt (III) chloride with ammonia, it was found that some of the chloride ions could be precipitated as AgCl on adding excess of AgNO3 solution in cold, but some remained in solution. The number ofions furnished by a complex in a solution can be determined by precipitation reactions. The measurement of molar conductance of solutions of coordination compounds helps to estimate the number of ions furnished by the compound in solution.

In these questions (Q. No. i-iv), a statement of assertion followed by a statement ofreason is given. Choose the correct answer out of the following choices.

  1. Assertion and reason both are correct statements and reason is correct explanation for assertion.
  2. Assertion and reason both are correct statements but reason is not correct explanation for assertion.
  3. Assertion is correct statement but reason is wrong statement.
  4. Assertion is wrong statement but reason is correct statement.
The following questions are multiple choice questions. Choose the most appropriate answer:

  1. Assertion: The complex [Co(NH3)3Cl3] does not give precipitate with silver nitrate solution.

Reason: The given complex is non-ionisable.

  1. Assertion: The complex [Co(NH3)4Cl2]Cl gives precipitate corresponding to 2 mol of AgCl with AgNO3 solution.

Reason: It ionises as [Co(NH3)4Cl2]+ + Cl-.

  1. Assertion: CoCl3. 4NH3 gives 1 mol of AgCl on reacting with AgNO3, its secondary valency is 6.

Reason: Secondary valency corresponds to coordination number.

  1. Assertion: 1 mol of [CrCl2(H2O)4]Cl· 2H2O will give 1 mol of AgCl on treating with AgNO3.

Reason: Cl- ions satisfying secondary valanceis will not be precipitated.

  1. Assertion: CoCl3. 3NH3 is not conducting while CoCl3. 5NH3 is conducting.

Reason: The complex of CoCl3. 3NH3 is [CoCl3(NH3)3] while that of CoCl3· 5NH3 is [CoCl(NH3)5]Cl3.

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Q 29Case study (4 Marks)4 Marks
Read the passage given below and answer the following questions:
Metal carbonyl is an example of coordination compounds in which carbon monoxide (CO) acts as ligand. These are also called homoleptic carbonyls. These compounds contain both $\sigma$ and $\pi$ character. Some carbonyls have metal-metal bonds. The reactivity of metal carbonyls is due to (i) the metal centre and (ii) the CO ligands. CO is capable of accepting an appreciable amount of electron density from the metal atom into their empty $\pi$ or $\pi-\text{orbital}.$ These types of ligands are called $\pi-\text{accepter}$ or $\pi-\text{acid}$ ligands. These interactions increases the $\Delta_0$ value.
The following questions are multiple choice questions. Choose the most appropriate answer:
  1. What is the oxidation state of metal in [Mn2(CO)10]?
  1. +1
  2. -1
  3. +2
  4. 0
  1. Among the following metal carbonyls, the C-O bond order is lowest in:
  1. [Mn(CO)6]+
  2. [Fe(CO)5]
  3. [Cr(CO)6]
  4. [V(CO)6]-
  1. Which of the following can be reduced easily?
  1. V(CO)6
  2. Mo(CO)6
  3. [Co(CO)4]-
  4. Fe(CO)5
  1. The oxidation state of cobalt in K[Co(CO)4] is:
  1. +1
  2. +3
  3. -1
  4. 0
  1. Structure of decacarbonyl manganese is:
  1. Trigonal bipyramidial
  2. Octahedral
  3. Tetrahedral
  4. Square pyramidal
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Q 30Case study (4 Marks)4 Marks
Read the passage given below and answer the following questions:

Ligands are atoms or ions which can donate electrons to the central atoms. Ligands can be monodentate, bidentate or polydentate as well. Few ligands can coordinate with the central atom through more than one site, these are called ambidentate ligands. When a di- or polydentate ligand uses its two or more donor atoms to bind a single metal ion, it is said to be a chelating ligand.

In these questions (Q. No. i-iv), a statement of assertion followed by a statement ofreason is given. Choose the correct answer out of the following choices.

  1. Assertion and reason both are correct statements and reason is correct explanation for assertion.
  2. Assertion and reason both are correct statements but reason is not correct explanation for assertion.
  3. Assertion is correct statement but reason is wrong statement.
  4. Assertion is wrong statement but reason is correct statement.
The following questions are multiple choice questions. Choose the most appropriate answer:

  1. Assertion: Glycinate ion is an example of monodentate ligand.

Reason: Glycinate contains N and O as donor atoms.

  1. Assertion: EDTA forms complex with divalent metals of 3d-series in the ratio of 1 : 1.

Reason: EDTA has 4 - COOH groups.

  1. Assertion: Oxalate ion is a bidentate ligan.

Reason: Oxalate ion has two donor atoms.

  1. Assertion: A chelating ligand must possess two or more lone pairs at such a distance that it may form suitable strain free 5 and 6 membered rings with the metal ion.

Reason: H2N - NH2 is a chelating ligand.

  1. Assertion: In Zeise's salt coordination number of Pt is five.

Reason: Ethene is a monodentate ligand.

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