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NEET Chemistry MCQ
Coordination Compounds Mcq Neet Chemistry
Quiz 1
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Q.1
Which of the following is the correct order of increasing field strength of ligands to form coordination compounds? [ NEET 2020]
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a) F- < SCN- < C2O42- < CN-
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b) CN- < C2O42- < SCN- < F-
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c) SCN- < F- < C2O42- < CN-
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d) SCN- < F- < CN-< C2O42-
Explanation
Answer: (c)
Q.2
Iron carbonyl, Fe(CO)5 is
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a) trinuclear
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b) mononuclear
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c) tetranuclear
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d) dinuclear
Explanation
Answer: (b)
Q.3
What is the correct electronic configuration of the central atom in K4[Fe(CN)6] based on crystal field theory? [NEET 2019]
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a) t2g4 eg2
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b) t2g6 eg0
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c) e3 t23
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d) e4 t22
Explanation
Answer:(b)
Q.4
The type of isomerism shown by the complex [CoCl2(en)2] is
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a) Ionization isomerism
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b) Coordination isomerism
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c) Geometrical isomerism
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d) Linkage isomerism
Explanation
4Fe3+ + 3[fe(CN)6]4- → Fe4[Fe(CN)6]3 Prussian blue Answer: (d)
Q.5
The geometry and magnetic behaviour of the complex [Ni(CO)4] are
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a) square planar geometry and paramagnetic
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b) tetrahedral geometry and diamagnetic
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c) square planar geometry and diamagnetic
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d) tetrahedral geometry and paramagnetic
Explanation
Answer: (b)
Q.6
Correct IUPAC name of K4[Fe(CN)6] is ? [ MP PMT 1995]
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a) tetra potassium ferrous cyanide
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b) potassium ferri cyanide
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c) potassium ferro cyanide
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d) potassiumhexacyanoferrate(II)
Explanation
Answer: (d)
Q.7
Oxidation Number of cobalt in K[Co(CO)4] is [ Harayana CEET 1996]
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a) +1
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b) +3
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c) -1
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d) -3
Explanation
1+x+4×(0) = 0 x = -1 The oxidation number, or oxidation state, of an atom is the charge that would exist on the atom if the bonding were completely ionic. This oxidation number is an indicator of the degree of oxidation (loss of electrons) of an atom in a chemical compound. Conceptually, the oxidation state, which may be positive, negative or zero, is the hypothetical charge that an atom would have if all bonds to atoms of different elements were 100% ionic, with no covalent component. Oxidation number are typically represented by small integers. Answer:(c)
Q.8
The compound which does not show paramagnetism is [ IIT Screening test 1992]
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a) [Cu(NH3)4]Cl2
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b) [Ag(NH3)2]Cl
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c) NO
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d) NO2
Explanation
[Ag(NH3)2]Cl contains Ag+ in d10 configuration, which is diamagnetic, all other are paramagnetic. Answer: (b)
Q.9
[Cu(NH3)4]SO4 is obtained by .. [ AIIMS 1994]
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a) Mixing equimolar amount of CuSO4 and (NH4)2SO4
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b) Adding concentrated ammonia solution to a solution of CuSO4
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c) Adding ammonia to copper turing followed by acidification with H2SO4
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d) Adding (NH4)2SO4 to a mixture of copper turing in H2SO4
Explanation
Answer: (d)
Q.10
Which of the following is the odd one out? [ MP CET 1996]
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a) Potassium ferricyanide
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b) Ferrous ammonium sulphate
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c) potassium ferrocyanide
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d) tetraamminecopper(II) sulphate
Explanation
Ferrous ammonium sulphate is double salt, all others are complex compound Answer: (b)
Q.11
[Pt(NH3)4Cl2]Br2 are related to each other as [ MP CEE 1996]
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a) Optical isomers
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b) Co-ordinate isomers
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c) Ionisation isomers
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d) Linkage isomers
Explanation
When ions changes its position, we get [Pt(NH3)4Br2]Cl2 as new compound. Thus both compounds are ionisation isomers Answer:(c)
Q.12
The complex CoCl3.3NH3 ionizes to give ..[pb. CET 1991]
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a) 2Cl- ions
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b) Cl- ions
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c) 3Cl- ions
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d) No Cl- ions
Explanation
CoCl3.3NH3 is complex compound, In this compound, three chloride ions satisfy primary as well as secondary valency. [Co(NH3)Cl3] which gives no Cl- ions on ionisation Answer: (d)
Q.13
Colour of compound [Cu(NH3)4]SO4 is .. [ AIIMS 1994]
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a) Blue
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b) green
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c) red
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d) violet
Explanation
Answer: (a)
Q.14
Which of the following complex will show geometrical as well as optical isomerism? [ Hariyana CEET 1996] (en = ethylenediamine)
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a) [Pt(NH3)2Cl2]
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b) [Pt(NH3)Cl4]
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c) [Pt(en)3]4+
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d) [Pt(en)2Cl2]
Explanation
[Pt(en)2Cl2] shows cis- and trans- isomerism and cis form shows optical activity The two isomers of this type of complex are mirror image of each other and cannot super impose on each other, hence they possess chirality character. Answer: (a)
Q.15
Hypo is used in photography because it si ..[AFMC 1993]
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a) strong oxidising agent
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b) strong reducing agent
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c) strong complexing agent
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d) None of the above
Explanation
Answer:(c)
Q.16
The coordination number of copper in cuprammonium sulphate is [ KCET 1990]
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a) 2
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b) 3
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c) 4
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d) 6
Explanation
Cuprammonium sulphate is [Cu(NH3)4]SO4 C.N. of Cu is 4 Answer: (c)
Q.17
The possible number of isomers for the complex [MCl2 Br2]SO4 is [AIIMS 1994]
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a) 1
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b) 2
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c) 4
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d) 5
Explanation
[MCl2 Br2]SO4 give [MCl2BrSO4]Br and [MClBr2SO4]Cl as ionization isomers and also cis and trans geometrical isomers are expected Answer: (c)
Q.18
Which of the following ions forms most stable complex compound? [ MP PMT 1995]
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a) Cu2+
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b) Ni2+
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c) Fe2+
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d) Mn2+
Explanation
Mn2+ has d5 configuration Answer: (d)
Q.19
In which there is outer orbital hybridization? [ BHU 1993]
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a) [Zn(NH3)6]2+
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b) [Co(NH3)6]3+
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c) [Cr(NH3)6]3+
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d) [V(NH3)6]3+
Explanation
there is a sp3d2 hybridization in [Zn(NH3)6]2+ Answer:(a)
Q.20
An example of double salt is ..[CBSE PMT 1989]
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a) Bleaching powder
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b) K4[Fe(CN)6]
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c) Hypo
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d) Potash alum
Explanation
Answer: (d)
Q.21
Which of the following represents UPAC name of [Co(NH3)6]Cl3 [ Pb. CET 1995]
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a) Hexaamminecobalt(III) chloride
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b) Cobalt (III) hexamine tri-chloride
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c) Cobalt hexamine chloride
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d) Hexamine cobalt chloride
Explanation
Answer: (a)
Q.22
The effective atomic number of central Cu(At no 29) metal in [Cu(NH3)4]SO4 is .. [ Pb CET 1996]
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a) 29
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b) 30
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c) 35
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d) 36
Explanation
Number of electrons in Cu+2 = 29 - 2 = 27 Number of electrons donated by NH3 = 2 × 4 = 8 Thus total electrons for Cu = 27 + 8 = 35 Effective atomic number of Cu = 35 Answer: (c)
Q.23
Which of the following is organometallic compound? [ AIIMS
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a) Ti(C2H4)4
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b) Ti(OC2H5)4
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c) Ti(OCOCH3)4
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d) Ti(OC6H5)4
Explanation
Except option' a' other option have Ti-O bonds Answer:(a)
Q.24
Ligands in a complex salts are [ KCET 1992]
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a) Anions linked by coordinate bonds to a central metal ion
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b) Cations linked by coordinate bonds to a central metal ion
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c) Molecules linked by coordinate bonds to central metal ion
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d) Ions or molecules linked by coordinate bonds to a central metal ion
Explanation
Answer: (d)
Q.25
The blue complex formed on addition of con. NH4OH {AIIMS 2001]
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a) [Cu(NH4)4]2+
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b) [Cu(NH3)2]2+
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c) [Cu(NH3)4]2+
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d) [Cu(NH4)2]2+
Explanation
Answer: (c)
Q.26
Which of the following is not an organometallic compound? [ MP CEE 1996]
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a) Ethyl magnesium bromide
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b) tetraethyl lead
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c) sodium ethoxide
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d) trimethyl aluminium
Explanation
sodium ethoxide contain O-Na bond and is not organo metallic compound Answer: (c)
Q.27
In the compound lithiumtetrahydroaluminate, the ligand is [ AIIMS 1997]
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a) H+
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b) H
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c) H-
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d) None of these
Explanation
In Li[AlH4], H- is the ligand Answer:(c)
Q.28
Which complex has square planar structure? [ MP PMT 1992]
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a) Ni (CO)4
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b) [NiCl4]2-
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c) [Ni(H2O)6]2+
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d) [Cu(NH3)4]2+
Explanation
Answer: (d)
Q.29
The complex ion which has no 'd' electrons in the central metal atom is (At No Cr=24, Mn=25, Fe=26, Co=27] [ IIT screening test 2001]
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a) [MnO4]-
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b) [Co(NH3)6]3+
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c) [Fe(CN)6]3-
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d) [Cr(H2O)6]3+
Explanation
Oxidation number of Mn in [MnO4]- is +7 which is achived bu losing all 3d5 and 4s2 electrons Answer: (a)
Q.30
Which of the following is paramagnetic? [ Haryana CEET 2000]
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a) [Fe(CN)6]4-
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b) [Ni(CO)4]
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c) [Ni(CN)4,/]2-
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d) [CoF6]3-
Explanation
Answer: (d)
0 h : 0 m : 1 s
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