Fe2(CO)9 is diamagnetic.Which of the following reasons is correct? C
- Presence of one CO as bridge group
- Presence of monodentate ligand
- Metal-metal(Fe-Fe) bond in molecule
- Resonance hybridization of CO
Which does not obey EAN rule? A
- (a) [Cu(NH3)4]2+
- (b) [Zn(OH)4]2-
- (c) [HgI4]2-
- (d) Fe(CO)5
The coordination number and oxidation state of Cr in K3[Cr(C2O4)3] are respectively C
- (a) 3 and +3
- (b) 3 and 0
- (c) 6 and +3
- (d) 4 and +2
Which one of the following octahedral complexes will not show geometrical isomerism? (A and B are monodentate ligands)
- (a) [MA4B2]
- (b) [MA5B]
- (c) [MA2B4]
- (d) [MA3B3]
According to IUPAC nomenclature sodium nitroprusside is named as B
- (a) sodium pentacyanonitrosyl ferrate(II)
- (b) sodium pentacyanonitrosyl ferrate(III)
- (c) sodium nitroferricyanide
- (d) sodium nitroferrocyanide
Amoung the following which is not the π -bonded organomettalic compound? D
- (a) K[PtCl3(η2 -C2H4)]
- (b) Fe(η5 -C2H5)2
- (c) Cr(η6 -C6H6)2
- (d) (CH3)4Sn
IUPAC name of [Pt(NH3)3 (Br)(NO2)Cl]Cl is A
- (a) triamminebromidochloridonitroplatinum(IV)Chloride
- (b) triamminebromonitrocholoroplatinum(IV)Chloride
- (c) triamminechlorobromonitroplatinum(IV)Chloride
- (d)triamminenitrochlorobromoplatinum(IV)Chloride
Which of the following cation does not form an ammine complex with excess of ammonia? D
- (a) Ag+
- (b) Cu2+
- (c) Cd2+
- (d) Na1+
EDTA is a ligand. B
- (a) monodentate
- (b) hexadentate
- (c) bidentate
- (d) tridentate
The coordination number of cobalt in[Co(en)2Br2]Cl2 is: C
- (a) 2
- (b) 4
- (c) 6
- (d) 8
The correct IUPAC name of KAI(SO4)2.12H2O is: B
- (a) aluminium potassium sulphate-12-water
- (b) potassium aluminium(III)sulphate-12-water
- (c) potassium aluminate(III)sulphatehydrate
- (d) aluminium(III) potassium sulphate hydrate-12
The correct IUPAC name of Mn3(CO)12 is : C
- (a) dodecacarbonylmanganate(0)
- (b) dodecacarbonylmanganate(II)
- (c) dodecacarbonyltrymanganese(0)
- (d) manganicdodecacarbonyl(0)
The complex showing a spin-only magnetic moment of 2.82 B.M. is: B
- (a) Ni(CO)4
- (b) [NiCl4]2-
- (c) Ni(PPh3)4
- (d) [Ni(CN)4]2-
Atomic number of Cr and Fe are respectively 24 and 26 which of the following is paramagnetic with the spin of electron? D
- (a) [Cr(CO)6]
- (b) [Fe(CO)5]
- (c) [Fe(CN)6]4-
- (d) [Cr(NH3)6]3+
The compound which does not show paramagnetism is: D
- (a) [Cu(NH3)4]Cl2
- (b)[Ag(NH3)2]Cl
- (c)NO
- (d) N2O4
A solution containing 2.675g of CoCl3.6NH3(molar mass=267.5g mol-1) is passed through a cation exchanger. The chloride ions obtained in solution were treated with excess of AgNo3 to give 4.78g of AgCl(molar mass=143.5g mol-1). The formula of the complex is:(At.mass of Ag=108u) B
- (a)[CoCl(NH3)5]Cl2
- (b) [CO(NH3)6]Cl3
- (c) [CoCl2(NH3)4]Cl
- (d) [CoCl3(NH3)3]
Trunbull’s blue is : B
- (a) ferricyanide
- (b) ferrous ferricyanide
- (c) ferrous cyanide
- (d) ferri ferrocyanide
The correct IUPAC name of AlCl3(EtOH)4 is : B
- (a) aluminium (II)Chloride-4-ethanol
- (b) aluminium (III)Chloride-4-ethanol
- (c) aluminium (IV)Chloride-4-hydroxy ethane
- (d) aluminium Chloride-4-ethanol
Which complex has square planar shape dsp2 hydridizatiop? D
- (a) [Ni(CN)4]2-
- (b) [Cu(NH3)42+
- (c) [PtCl4]2-
- (d) All of these
Which has regular tetrahedral geometry? C
- (a) [Ni(CN)4]2+
- (b) SF4
- (c) [BF4]–
- (d) XeF4
The primary valency of Fe in K3[Fe(Cn)6] is: A
- (a) 3
- (b) 2
- (c) 1
- (d) zero
The IUPAC name for the complex [Co(NO2)(NH3)5]Cl2 is: D
- (a) nitro-N-pentaamminecobalt(III)chloride
- (b) nitro-N-pentaamminecobalt(II)chloride
- (c) pentaamminenitro-N-cobalt(II)chloride
- (d) pentaamminenitro-N-cobalt(III)chloride
The total number of possible isomers for the complex compound[CuII(NH3)4][PtIICl4] are D
- (a) 5
- (b) 6
- (c) 3
- (d) 4
Out of TiF62-,CoF63-,Cu2Cl2and NiCl42-(At. no. Z of Ti=22, Co=27, Cu=29, Ni=28), the colourless species are C
- (a) TiF62- and CoF63-
- (b) Cu2Cl2 and NiCl42-
- (c) TiF62- and Cu2Cl2
- (d) CoF63- and NiCl42-
The correct name of the compound [Cu(NH3)4](NO3)2, according to IUPAC system is: C
- (a) cuprammonium nitrate
- (b) tetraamminecopper(II)dinitrate
- (c) tetraamminecopper(II)nitrate
- (d) tetraamminecopper(I)dinitrate
Ferrocene is : A
- (a) Fe(η5 -C5H5)2
- (b) Fe(η2 -C5H5)2
- (c) Cr(η5 -C5H5)5
- (d) Os(η5-C5H5)2
The ionization isomer of [Cr(H2O)4Cl(NO2)]Cl is : B
- (a) [Cr(H2O)4(O2N)]Cl2
- (b) [Cr(H2O)4Cl2](NO2)
- (c) [Cr(H2O)4Cl(ONO)]Cl
- (d) [Cr(H2O)4Cl2(NO2)].H2O
Among [Ni(CO)4],[Ni(CN)4]2-, [NiCl4]2- species, the hybridisation states of the Ni atom are, respectively (At. no. of Ni=28) B
- (a) sp3,dsp2.dsp2
- (b) sp3,dsp2,sp3
- (c) sp3,sp3,dsp2
- (d) dsp2,sp3,sp3
The correct order of magnetic moments (only spin value in BM)among is: D
- (a) [Fe(Cn)6]4->[CoCl4]2->[MnCl4]2-
- (b) [MnCl4]2->[Fe(Cn)6]4>[CoCl4]2-
- (c) [Fe(Cn)6]4>[MnCl4]2->[CoCl4]2-
- (d) [MnCl4]2->[CoCl4]2->[Fe(Cn)6]4-
Among the following complexes(K,P),K3[Fe(CN)6(k),[Co(NH3)6Cl3(L),Na3[Co(oxalate)3](M),[Ni(H2O)6Cl2(N),K2[Pt(CN)4(O), and [Zn(H2O)6(NO3)2(P) the diamagnetic complexes are:
- (a) K,L,M,N
- (b) K,M,O,P
- (c) L,M,O,P
- (d) L,M,N,O
A solution of CuCl in NH4OH is used to measure the amount of which gas is a sample by simply measuring change in volume? C
- 1. CO2
- 2. H2
- 3. CO
- 4. All of these
Which order is correct in spectrochemical series of ligands? A
- (a) Cl–<F–<[C2O4]2-<NO2–<CN–
- (b) CN–<[C2O4)2–<Cl–>NO2–<F–
- (c) [C2O4)2-<F–<Cl–>NO2–<CN–
- (d) F–<Cl–<NO2–<CN–<[C2O4]2-
Which of the following will exhibit maximum ionic conductivity? A
- (a) K4[Fe(CN)6]
- (b) [Co(NH3)6]Cl3
- (c) [Cu(NH3)4]Cl2
- (d) [Ni(CO)4]
The IUPAC name of [Pt(NH3)4NO2Cl]SO4 is : B
- (a) chloronitroplatinum(IV)sulphate
- (b) tetraamminechloridonitritoplatinum(IV)sulphate
- (c) chloronitrotetraammineplatinum(IV)sulphate
- (d) platinum(IV)tetraamminenitrochloro sulphate
The probable formula for prussian blue is : C
- (a) Fe3[Fe(CN)6]2
- (b) Fe2[Fe(CN)6]3
- (c) Fe4[Fe(CN)6]3
- (d) Fe3[Fe(CN)6]4
The IUPAC name of [CoCl(NO2)(en)2]Cl is: C
- (a) chloronitro-bis(ethylenediamine)cobaltic(III)chloride
- (b) chloronitro-bis(ethylenediamine)cobaltic(II)chloride
- (c)chloro-bis(ethylenediamine)nitrocobaltic(III)chloride
- (d)bis-(ethylenediamine)chloronitrocobaltic(III)chloride
[Cr(H2O)6Cl3 (at. no. of Cr=24) has a magnetic moment of 3.83 BM, the correct distribution of 3d electrons in the chromium of the complex is D
- (a) 3d1xy,3d1yz,3d1z2
- (b) 3d(x2-y2),3d1z2,3d1xz
- (c) 3dxy,3d(x2-y2),3d1yz
- (d) 3d1xy,3d1yz,3d1zx
An example of a sigma bonded organometallic compound is- NEET 2017 B
(a) ruthenocene (b) Grignard’s reagent
(c) ferrocene (d) cobaltocene
The correct order of the stoichiometrics of AgCl formed when AgNO3 in excess is treated with the complexes:- CoCl3.6NH3, CoCl3.5NH3, CoCl3.4NH3 respectively is NEET- 2017 C
- (a) 1 AgCl, 3 AgCl, 2 AgCl
- (b) 3 AgCl, 1 AgCl, 2 AgCl
- (c) 3 AgCl, 2 AgCl, 1 AgCl
- (d) 2 AgCl, 3AgCl, 1 AgCl
Correct increasing order for the wavelengths of absorption in the visible region for the complexes of CO3+ is NEET-2017 A
- (a) [CO(en)3]3+, [CO(NH3)63+ CO(H2O)6]3+
- (b) [CO(H2O)6]3+, [CO(en)3]3+. [CO(NH3)6]3+
- (c) [CO(H2O)6]3+, (CO(NH3)6]3+ , [CO(en)3]3+
- (d) [CO(NH2)8]3+, [CO(en)3]3+, [CO(H2O)6]3+
Pick out the correct statement with respect to [Mn(CN)6]3- NEET- 2017 C
- (a) it is sp3d2 hybridised and octahedral
- (b) It is sp3d2 hybridised and tetrahedral
- (c) It is d2sp3 hybridised and octahedral
- (d) It is dsp2 hybridised and square planar
The correct increasing order of trans-effect of the following species is NEET-2016 B
- (a) NH3 > CN– > Br– > C6H5–
- (b) CN– > C6H5– > Br– > NH3
- (c) Br– > CN– >NH3 > C6H5–
- (d) CN– > Br– >C6H5– >NH3
Jahn-Teller effect is not observed in high spin complexes of NEET- 2016 B
- (a) d7
- (b) d8
- (c) d4
- (d) d9
Which of the following has longest C-O bond length? (Free C-O bond length in CO is 1.128 Å.) NEET- 2016 B
- (a) [Co(СО)4]–
- (b) [Fe(CO)4]2-
- (c) [Mn(CO)6]+
- (d) Ni(CO)4
Which of the following statements is false? NEET- 2016 B
- (a) Ca2+ ions are important in blood clotting
- (b) Ca2+ ions are not important in maintaining the regular beating of the heart
- (c) Mg2+ ions are important in the green parts of plants
- (d) Mg2+ ions form a complex with ATP
Cobalt (III) chloride forms several octahedral complexes with ammonia. Which of the following will not give test for chloride ions with silver nitrate at 25°C? NEET- 2015 A
- (a) CoCl3.3NH3
- (b) CoCl3 .NH3
- (c) CoCI3 .5NH3
- (d) CoCl3.6NH3
Which of these statements about [CO(CN)6]3- is true? NEET- 2015 A
- (a) [CO(CN)6]3- has no unpaired electrons and will be in a low-spin configuration.
- (b) [CO(CN)6]3- has four unpaired electrons and will be in a low-spin configuration.
- (c) [CO(CN)6]3- has four unpaired electrons and will be in a high-spin configuration.
- (d) [CO(CN)6]3- has no unpaired electrons and will be in a high-spin configuration.
Number of possible isomers for the complex [Co(en)2Cl2]Cl will be
[en = ethlenediamine] NEET- 2015 C
(a) 2 (b) 1
(c) 3 (d) 4
The hybridisation involved in complex [Ni(CN)4]2- is (Atomic number of Ni = 28) NEET- 2015 A
(a) dsp2 (b) sp3
(c) d2sp2 (d) d2sp3
The sum of coordination number and oxidation number of the metal M in the complex M(en)2(C2O4)]Cl (where, en is ethylenediamine) is NEET- 2015 A
- (a) 9
- (b) 6
- (c) 7
- (d) 8
The name of complex ion, [Fe(CN)6]3- is :- NEET- 2015 D
- (a) hexacyanoiron (III) ion
- (b) hexacyanitoferrate (III) ion
- (c) tricyanoferrate (III) ion
- (d) hexacyanidoferrate (III)ion
Among the following complexes, the one which shows zero crystal field stabilisation energy (CFSE) is:- NEET- 2014 B
- (a) [Mn(H2O)6]3+
- (b) [Fe(H2O)6]3+
- (c) [Co(H2O)6]2+
- (d) [Co(H2O)6]3+
Which of the following complexes is used to be as an anticancer agent? NEET- 2014 B
(a) mer-[Co(NH3)3Cl3 (b) cis-[PtCI2(NH3)2]
(c) cis-K2[PtCl2 Br2] (d) Na2CoCl4
A magnetic moment of 1.73 BM will be shown by one among the following NEET- 2013 A
(a) [Cu(NH3)4]2+ (b) [Ni(CN)4]2-
(c) TiCl4 (d) [CoCl6]4-
Which one of the following is an outer orbital complex and exhibits paramagnetic behaviour? NEET- 2012 A
(a) [Ni(NH3)6]2+ (b) [Zn(NH3)6]2+
(c) [Cr(NH3)6]3+ (d) [Co(NH3)6]3+
The d-electron configurations of Cr2+, Mn2+, Fe2+ and CO2+ are d4, d5, d6 and d7 respectively. Which one of the following will exhibit minimum paramagnetic behaviour? NEET- 2011 B
- (At. no. Cr = 24, Mn =25, Fe=26, CO=27)
- (a) [Fe(H2O)6]2+
- (b) [Co(H2O)6]2+
- (c) [Cr(H2O)6]2+
- (d) [Mn(H2O)6]2+
Of the following complex ions, which is diamagnetic in nature? NEET-2011 A
(a) [Ni(CN)4]2- (b) [CuCl4]2-
(c) [CoF6]3- (d) [NiCl4]2-
The complexes [CO(NH3)6] [Cr(CN)6] and [Cr(NH3)6] [Co(CN)6] are the examples of which type of isomerism? NEET- 2011 B
- (a) lonisation isomerism
- (b) Coordination isomerism
- (c) Geometrical isomerism
- (d) Linkage isomerism
The complex, [Pt(Py)(NH3)BrCl] will have how many geometrical isomers? NEET- 2011 D
- (a) 4
- (b) 0
- (c) 2
- (d) 3
Which of the following complex ions is not expected to absorb visible light ? NEET-2010 A
- (a) [Ni(CN)4]2-
- (b) [Cr(NH3)6]3+
- (c) [Fe(H2O)6]2+
- (d) [Ni(H2O)6]2+
The existence of two different coloured complexes with the composition of [Co(NH3)4Cl2]+ is due to :- NEET- 2010 B
- (a) linkage isomerism
- (b) geometrical isomerism
- (c) coordination isomerism
- (d) ionisation isomerism
Which of the following does not show optical isomerism ? NEET- 2009 B (en-ethylenediamine)
- (a) [Co(en)2Cl2]+
- (b) [Co(NH3)3Cl3]0
- (c) [Co(en)Cl2(NH3)2]+
- (d) [Co(en)3]3+
Which of the following complex ions is expected to absorb visible light? (At. no. Zn =30, Sc =21, Ti =22, Cr=24) NEET- 2009 C
- (a) [Sc(H2O)3(NH3)3]3+
- (b) [Ti(en)2(NH3)2]4+
- (c) [Cr(NH3)6]3+
- (d) [Zn(NH3)6]2+
Which of the following complexes exhibits the highest paramagnetic behaviour? where gly = glycine, en = ethylenediamine and bpy = bipyridyl moieties (At no : Ti = 22, V = 23, Fe= 26, Co = 27) NEET- 2009 C
- (a) [V(gly)2 (OH)2(NH3)2]+
- (b) [Fe(en)(bpy)NH3)2]2+
- (c) [Co(OX)2(OH)2]–
- (d) [Ti(NH3)6]3+
In which of the following coordination entities the magnitude of Δoct (CFSE in octahedral field) will be maximum? (Atomic number Co = 27) NEET- 2008 C
- (a) [Co(H2O)6]3+
- (b) [Co(NH3)6]3+
- (c) [Co(CN)6]3-
- (d) [Co(C2O4)3]3-
Copper sulphate dissolves in excess of KCN to give : NEET- 2006 B
- (a) CuCN
- (b) [Cu(CN)4]3-
- (c) [Cu(CN4]2-
- (d) Cu(CN)2
[Co(NH3)4(NO2)2]Cl exhibits: NEET- 2006 B
- (a) linkage isomerism, ionization isomerism and optical isomerism
- (b) linkage isomerism, ionization isomerism and geometrical isomerism
- (c) ionisation isomerism, geometrical isomerism and optical isomerism
- (d) linkage isomerism, geometrical isomerism and optical isomerism
1. When 0.1 mol CoCl3(NH3)5 is combined with excess AgNO3, then 0.2 mol AgCl is obtained. The conductivity of the solution suits the
- 1:3 electrolyte
- 1:1 electrolyte
- 3:1 electrolyte
- 1:2 electrolyte
Answer: (d)
2. 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?
- Thiosulphato
- Oxalato
- Glycinato
- Ethane-1,2-diamine
Answer: (a)
3. IUPAC name of [Pt(NH3)2Cl(NO2)] is
- Platinum diamminechloronitrite
- Chloronitrito-N-ammineplatinum (II)
- Diamminechloridonitrito-N-platinum (II)
- Diamminechloronitrito-N-plantinate (II)
Answer: (c)
4. In the complex [E(en)2(C2O4)]NO2 (where (en) is ethylenediamine) _______are the coordination number and the oxidation state of the element ‘E’ respectively.
- 6 and 2
- 2 and 2
- 4 and 3
- 6 and 3
Answer: (d)
5. The sum of coordination number and oxidation number of the metal M in the complex [M(en)2(C2O4)]Cl (where (en) is ethylenediamine) is
- 9
- 6
- 7
- 8
Answer: (a)
6. Some salts containing two different metallic elements give test for only one of them in solution, such salts are
- double salts
- normal salts
- complex salts
- None of these
Answer: (c)
7. An example of a sigma bonded organometallic compound is
- Grignard reagent
- Ferrocene
- Cobaltocene
- Ruthenocene
Answer: (a)
8. Iron carbonyl, Fe(CO)5 is
- Tetranuclear
- Mononuclear
- Dinuclear
- Trinuclear
Answer: (b)
9. The type of isomerism shown by the complex [CoCl2(en)2] is
- Geometrical isomerism
- Coordination isomerism
- Linkage isomerism
- Ionization isomerism
Answer: (a)
10. Which of the following elements do not form a complex with EDTA?
- Ca
- Mg
- Be
- Sr
Answer: (c)
MCQ on Coordination Compounds, MCQ on Coordination Compounds for NEET and JEE MAIN