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Coordination Compounds 12 MCQs Questions with Answers
Which of the following compounds has tetrahedral geometry?
(a) [Ni(CN)4]2-
(b) [Pd(CN)4]2-
(c [PdCl4]2-
(d) [NiCl4]2-
Answer: (d) [NiCl4]2-
According to Werner’s theory of coordination compounds
(a) Primary valency is ionisable
(b) Secondary valency is ionisable
(c) Primary and secondary valencies are lonisable
(d) Neither primary nor secondary valency ¡s ionisable
Answer: (a) Primary valency is ionisable
The ligand N(CH2CH2NH2) is
(a) bidentate
(b) tridentate
(c) tetradentate
(d) pentadentate
Answer: (c) tetradentate
Which of the following ligands form a chelate?
(a) Acetate
(b) Oxalate
(c) Cyanide
(d) Ammonia
Answer: (b) Oxalate
Which of the following ligands will not show chelation?
(a) EDTA
(b) DMG
(c) Ethene-1, 2-diamine
(d) SCN–
Answer: (d) SCN–
The oxidation number of Cr in a [Cr(NH3)2F4]– complex is
(a) II
(b) III
(c) IV
(d) VI
Answer: (b) III
The name of [Co(NH2)3 (NO2)3] is
(a) Tinitrotriamminecobalt(III)
(b) Trinjtrotriamminecobalt(II)
(c) Trirtitrotriamjninecobalt (III) ion
(d) TrinitrotnamminecobaHate (III)
Answer: (a) Tinitrotriamminecobalt(III)
The number of halide ions in [Pt(NH3)3Cl3Br]Cl will be
(a) 4
(b) 3
(c) 2
(d) 1
Answer: (d) 1
One among the following is an example of hexadentate ligands
(a) 2,2-bipyridyl
(b) ethylenediammine tetra acetate ion
(c) dimethyl glyoxime
(d) Tetracarbonyl nickel
Answer: b) ethylenediammine tetra acetate ion
The correct structural formulae of Zeise’s salt is
(a) K+ [PtCl3(C2H4)]–
(b) K+ [PtCl2-η²-(C2H4)]Cl–
(c) K2 [PtCl3-η²-C2H4)]
(d) K+ [PtCl3-η²-(C2H4)]–
Answer: (d) K+ [PtCl3-η²-(C2H4)]–
Amongst Ni (CO)4, [Ni(CN)4]2- and NiCl42-
(a) Ni(CO)4 and NiCl42- are diamagnetic and [Ni(CN)4]2- is paramagnetic
(b) NiCl42- arrd [Ni(CN)4]2- are diamagnetic and Ni(CO)4 is paramagnetic.
(c) Ni(CO)4 and [Ni(CN)4]2- are diamagnetic and [NiCl4]2- is paramagnetic.
(d) Ni(CO)4 is diamagnetic and [NiCl4]2- and [Ni(CN)4]2- are paramagnetic.
Answer: (c) Ni(CO)4 and [Ni(CN)4]2- are diamagnetic and [NiCl4]2- is paramagnetic.
Which of the following has magnesium?
(a) Chlorophyll
(b) Haemocyanin
(c) Carbonic anhydrate
(d) Vitamin B12
Answer: (a) Chlorophyll
EDTA is used for the estimation of
(a) Na+ and K+ ions
(b) Cl– and Br– ions
(c) Cu2+ and Cs+ ions
(d) Ca2+ and Mg2+ ions
Answer: (d) Ca2+ and Mg2+ ions
Which of these statements about [Co(CN)6]3- is true?
(a) It has 4 unpaired electron, high spin
(b) No unpaired electron, high spin
(c) No unpaired electron, low spin
(d) 4 unpaired electron, low spin
Answer: (c) No unpaired electron, low spin
The correct order of the stoichiometries of AgCl formed when AgNO3 in excess is treated with complexes: COCl3.6NH3, C0Cl3.5NH3, C0Cl3.4NH3 respectively is
(a) 3AgCl, lAgCl, 2AgCl
(b) 3AgCl, 2AgCl, 1AgCl
(c) 2AgCl, 3AgCl, 2AgCl
(d) lAgCl, 3AgCl, 2AgCl
Answer: (b) 3AgCl, 2AgCl, 1AgCl
The correct IUPAC name of the coordination compound K3|Fe(CN)5NO| is
(a) Potassium pentacyanonitrosylferrate (II)
(b) Potassium pentacyanonitroferrate (II)
(c) Potassium nitritopentacyanoferrate (IV)
(d) Potassium nitritepentacynanoiron (II)
Answer: (a) Potassium pentacyanonitrosylferrate (II)
|Pt(NH3)4| |CuCl4| and |Cu(NH3)4||PtCl4| are known as
(a) ionisation isomers.
(b) coordination isomers
(c) linkage isomers
(d) polymerisation isomers
Answer: (b) coordination isomers
Which of the following will not show geometrical isomerism?
(a) [Cr(NH3)4Cl2]Cl
(b) [Co(en)2Cl2]Cl
(c) [(Co(NH3)5NO2]Cl2
(d) [Pt(NH3)2Cl2]
Answer: (c) (Co(NH3)5NO2]Cl2
Which of the following ligands is a bidentate ligand?
(a) Py
(b) Bipy
(c) dien
(d) EDTA
Answer: (b) Bipy
In Ni (CO)4, the nickel atom is ……… hybridised
(a) sp²
(b) sp³
(c) dsp²
(d) sp³d
Answer: (b) sp³
The hybridisation involved in [Co(C2O4)3]3- is
(a) sp3d2
(b) sp3d3
(c) dsp3
(d) d2sp3
Answer: (d) d2sp3
On treatment of 100 mL of 0.1 MCOCl3.6H2O with excess of AgNO3, 1.2 × 1022 ions are precipitated. The complex is
(a) [Co(H2O)4Cl2]Cl.2H2O
(b) [Co(H2O)3Cl3]3H2O
(c) [Co(H2O)6] Cl3
(d) [Co(H2O)5 Cl] Cl2.H2O
Answer: (d) [Co(H2O)5 Cl] Cl2.H2O
The CFSE for octahedral [CoCl6]4- is 18,000 cm-1. The CFSE for tetrahedral [CoCl4]2- will be
(a) 18,000 cm-1
(b) 16,000 cm-1
(c) 8,000 cm-1
(d) 20,000 cm-1
Answer: (c) 8,000 cm-1
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?
(a) thiosulphato
(b) oxalato
(c) glycinato
(d) ethane-1, 2-diamine
Answer: (a) thiosulphato
Mohr’s salt is
(a) Fe2(SO4) 3 . (NH4)2SO4 . 6H2O
(b) FeSO4 . (NH4)2 . SO4 . 6H2O
(c) MgSO4 . 7H2O
(d) FeSO4 . 7H2O
Answer: (b) FeSO4 . (NH4)2 . SO4 . 6H2O
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