Chapter 9 Coordination Compounds MCQs for Class 12 Chemistry

Chapter 9 Coordination Compounds MCQs for Class 12 Chemistry

Here students can practice Chapter 9 Coordination Compounds MCQs for Class 12 Chemistry. All the MCQs are divided into several sub-pages. Each page has 40 MCQs, for the next page just scroll down and click on the button. Also you can practice Class 12 Chemistry MCQs (Multiple Choice Questions) for other units.

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Q 1.: How many isomers are possible in [Co(en)2Cl2] ?

(A) One

(B) Two

(C) Four

(D) Six

Option – C

Q 2.: Which of the following complexes have lowest molar conductance ?

(A) CoCl3 . 6NH3

(B) CoCl3 . 5NH3

(C) CoCl3 . 4NH3

(D) CoCl3 . 3NH3

Option – D

Q 3.: The IUPAC name of the complex ion formed when gold dissolves in Aqua-regia is :

(A) tetrachloridoaurate(III)

(B) tetrachloridoaurate(II)

(C) tetrachloridoaurate(I)

(D) dichloridoaurate(III)

Option – A

Q 4.: In [CoF6]–3 , Co+3 uses outer d-orbitals (4d) in sp3d2 hybridisation. The number of unpaired electrons present in complex ion is :

(A) One

(B) Two

(C) Three

(D) Four

Option – D

Q 5.: Crystal field theory does not explain which of the following property of coordination compounds ?

(A) The covalent character of the bond between metal and the ligand

(B) Magnetic property

(C) Colour

(D) Structure of coordination compounds

Option – A

Q 6.: A magnetic moment of 1.73 BM will be shown by one among the following.

(A) [TiCl4]

(B) [CoCl6]–4

(C) [Cu(NH3)4]+2 

(D) [Ni(CN)4] –2

Option – C

Q 7.: The complex used as an anticancer agent is ;

(A) mer-[Co(NH3)3Cl3]

(B) cis-[PtCl2(NH3)2]

(C) cis-K2[PtCl2Br2]

(D) trans-K2[PtCl2Br2]

Option – B

Q 8.: The hybridization of central metal ion in K2[Ni(CN)4] and K2[NiCl4] are respectively

(A) dsp2 , sp3

(B) sp3 , sp3

(C) sp3 , sp3d2

(D) dsp2 , d2sp3

Option – A

Q 9.: Red precipitate is obtained when ethanol solution of dimethylglyoxime is added to ammoniacal Ni+2 solution. Which of the following statement is not true ?

(A) Red complex has a square planar geometry

(B) Complex has symmetrical H-bonding

(C) Dimethylglyoxime functions as bidentate ligand

(D) Red complex has a tetrahedral geometry

Option – D

Q 10.: The IUPAC name of K2[Ni(CN)4] is

(A) potassium tetracyanatonickelate(III)

(B) potassium tetracyanatonickel(II)

(C) potassium tetracyanonickelate(II)

(D) potassium tetracyanonickel(III)

Option – C

Q 11.: Which of the following complex ion is diamagnetic in nature ?

(A) [CoF6] –3    

(B) [Ni(CN)4] –2    

(C) [NiCl4] –2    

(D) [CuCl2] –2    

Option – B

Q 12.: The ligand N(CH2CH2NH2)3 is

(A) Bidentate

(B) Tridentate

(C) Tetradentate

(D) Pentadentate

Option – C

Q 13.: Ammonia gas does not evolve from the complex FeCl3 .4NH3 but it fives white precipitate with aqueous solution of AgNO3. Coordination number of central metal ion in the above complex is six. Give IUPAC name of the complex.

(A) Dichlorotetraammineferric(III) chloride

(B) Dichlorotetraammineferrate(II) chloride

(C) Tetraammineferric(III) chloride

(D) Ammoniumtrichloridetriammineferric(III)

Option – A

Q 14.: Crystal field stabilisation energy for high spin d4 octahedral complex is :

(A) ―1.6 Δo

(B) ―0.6 Δo

(C) ―0.4 Δo

(D) ―1.2 Δo

Option – B

Q 15.: Number of isomeric forms (linkage and stereoisomers) for[Rh(en)2(NO2)(SCN)]+1 are

(A) Three

(B) Six

(C) Nine

(D) Twelve

Option – D

Q 16.: The existence of two different coloured complexes with the composition [Co(NH3)4Cl2]+1 is due to

(A) Ionisation isomerism

(B) Linkage isomerism

(C) Geometrical isomerism

(D) Coordination isomerism

Option – C

Q 17.: The name of the complex [Pt(NH3)6]Cl4 is

(A) hexaammineplatinum(IV) chloride

(B) hexaammineplatinum (II) chloride

(C) tetrachlorohexammineplatinum(IV)

(D) tetrachlorohexammineplatinum(II)

Option – A

Q 18.: Choose the correct statement

(A) [Co(NH3)6]+2 is oxidised to diamagnetic [Co(NH3)6]+3 by the oxygen in air

(B) Tetrahedral complexes are more stable than octahedral complexes

(C) [Fe(CN)6]–3 is stable but [FeF6]–3 is unstable

(D) The [Cu(NH3)4]+2 ion has a tetrahedral geometry and is diamagnetic

Option – A

Q 19.: Which one of the following is wrongly match ?

(A) [Cu(NH3)4]+2  =  Square planar

(B) [Co(en)3]+3  =  Follows EAN rule

(C) [Ni(CO)4]  =  Neutral ligand

(D) [Fe(CN)6]–3  =  sp3d2 

Option – D

Q 20.: Show the coordination number of the metal ion, its oxidation number, the number of electrons in d-orbitals and the number of unpaired electrons in d-orbitals respectively in complex [Co(H2O)4SO3]Cl.

(A) 6, 3, 6, 0

(B) 6, 3, 6, 4

(C) 5, 3, 6, 0

(D) 5, 3, 6, 4 

Option – B

Q 21.: In which one of the pairs of ions given, there is an ion that forms a coordination compound with both aqueous sodium hydroxide and ammonia and another ion that forms a coordination compound only with aqueous sodium hydroxide ?

(A) Cu+2 , Zn+2 

(B) Zn+2 , Al+3

(C) Al+3 , Cu+2 

(D) Pb+2 , Cu+2 

Option – B

Q 22.: Which of the following salts is colourless ?

(A) CdCl2

(B) CuSO4.5H2O     

(C) MnSO4.7H2O

(D) NiSO4.7H2O

Option – A

Q 23.: Which of the following ligands is not a chelating agent ?

(A) EDTA

(B) en

(C) Oxalate

(D) Pyridine

Option – D

Q 24.: Which one of the following is an outer orbital complex and exhibits paramagnetic behaviour ?

(A) [Zn(NH3)6]+2

(B) [Ni(NH3)6]+2

(C) [Cr(NH3)6]+3

(D) [Co(NH3)6]+3 

Option – B

Q 25.: Which of the following compounds shows optical isomerism ?

(A) [Co(CN)6]–3    

(B) [Cu(NH3)4]+2   

(C) [Cr(C2O4)3]+3  

(D) [ZnCl4] –2    

Option – C

Q 26.: The d-electronic configuration of Cr+2 , Mn+2 , Fe+2 and Co+2 are d4, d5, d6 and d7 respectively. Which one of the following will exhibit minimum paramagnetic behaviour ? (At. No. of Cr=24, Mn=25, Fe=26, Co=27)

(A) [Cr(H2O)6]+2

(B) [Mn(H2O)6]+2

(C) [Fe(H2O)6]+2 

(D) [Co(H2O)6]+2

Option – D

Q 27.: The complex [Pt(py)(NH3)BrCl] will have how many geometrical isomerism ?

(A) One

(B) Two

(C) Three

(D) Four

Option – C

Q 28.: In the brown ring complex [Fe(H2O)5(NO)]SO4 , nitric oxide behave as :

(A) NO+1 

(B) NO–1    

(C) Neutral

(D) NO–2    

Option – A

Q 29.: The effective atomic number of Cr (At no. 24) in [Cr(NH3)6]Cl3 in solution ?

(A) 27

(B) 35

(C) 36

(D) 33

Option – D

Q 30.: Which of the following complex ion is not expected to absorb visible light ?

(A) [Ni(H2O)6]+2

(B) [Ni(CN)4]–2  

(C) [Cr(NH3)6]+3

(D) [Fe(H2O)6]+2 

Option – B

Q 31.: Among the following complexes, the one which show zero crystal field stabilization energy (CFSE) is :

(A) [Mn(H2O)6]+3

(B) [Fe(H2O)6]+3 

(C) [Co(H2O)6]+2 

(D) [Co(H2O)6]+3

Option – B

Q 32.: Which of the following compounds show optical isomerism ?

I.  cis-[Co(NH3)4Cl2]+1         

II. trans-[Co(en)2Cl2]+1

III.  cis-[Co(en)2Cl2]+1           

IV. [Co(en)3]+3

(A) I and II

(B) II and III

(C) III and IV

(D) I, III and IV

Option – C

Q 33.: The oxidation number of Co in [Co(NH3)3(NO2)3] is

(A) 0

(B) +2

(C) +3

(D) +5

Option – C

Q 34.: Compound [PtCl2(NH3)4]Br2 and [PtBr2(NH3)4]Cl2 shows the following type of isomerism.

(A) Ionisation isomerism

(B) Hydrated isomerism

(C) Linkage isomerism

(D) Coordination position isomerism

Option – A

Q 35.: The complexes [Co(NH3)6][Cr(CN)6] and [Cr(NH3)6][Co(CN)6] are the examples of which type of isomerism ?

(A) Ionisation isomerism

(B) Hydrated isomerism

(C) Linkage isomerism

(D) Coordination isomerism

Option – D

Q 36.: [Se(H2O)6]+3 ion is

(A) Colourless and diamagnetic

(B) Colourless and paramagnetic

(C) Coloured and octahedral

(D) Coloured and paramagnetic

Option – A

Q 37.: The pair of compounds that can exist together is :

(A) HgCl, SnCl2

(B) FeCl3 , SnCl2

(C) FeCl2 , SnCl2

(D) FeCl3 , KI

Option – C

Q 38.: EDTA has coordination number

(A) Three

(B) Four

(C) Five

(D) Six

Option – D

Q 39.: The coordination number of platinum in [Pt(NH3)4Cl2]+2 ion is

(A) Two

(B) Four

(C) Six

(D) Eight

Option – C

Q 40.: How many ions are produced from [Co(NH3)6]Cl3 in solution ?

(A) Two

(B) Three

(C) Four

(D) Six

Option – C

Pagination

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We hope that these Chapter 9 Coordination Compounds MCQs for Class 12 Chemistry helped you in learning new concepts. All questions are based on NCERT syllabus and some of them have been asked in various competitive exams. You can go to the next pages to practice more for Chapter 9 Coordination Compounds MCQs for Class 12 Chemistry, click on the question range given above. 

Also you can practice Class 12 Chemistry MCQs (Multiple Choice Questions) for other units.