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NEET Chemistry MCQ
Coordination Compounds Mcq Neet Chemistry
Quiz 3
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Q.1
Mg is an important component of which biomolecule occurring extensively in living world? [ CBSE PMT 2000]
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a) Haemoglobin
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b) Chlorophyll
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c) Florigen
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d) ATP
Explanation
Answer: (b)
Q.2
The total number of possible isomers of the complex compound [CuII(NH3)4][PtIICl4] is ..[ CBSE PMT 1998]
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a) 3
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b) 6
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c) 5
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d) 4
Explanation
(i) [Cu(NH3)4Cl][PtCl3 NH3] ii) [ CuNH3Cl3] [Pt(NH3)3Cl] iii) [CuCl4][Pt(NH3)3] iv) [Cu(NH3)2Cl2] [Pt(NH3)2Cl2] Answer:(d)
Q.3
Which of the following is paramagnetic? [ AFMC 1997]
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a) [Ni(CO)4]
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b) [Co(NH3)6]2+
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c) [Ni(CN)4]2-
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d) [NiCl4]2-
Explanation
[NiCl4]2- is paramagnetic because of unpaired electrons Answer: (d)
Q.4
Which of the following species represent the example of dsp2 hybridization? [ MP CEE 1999]
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a) [Fe(CN)6]3-
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b) [Ni(CN)4]2-
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c) [Zn(NH3)4]2+
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d) [FeF6]3-
Explanation
Answer: (b)
Q.5
According to the postulate of Werner for coordination compounds ..[ MP PMT 2002]
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a) Primary valency is ionizable
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b) Secondary valency is ionizable
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c) Primary and Secondary valencies are non-ionizable
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d) Only primary valency is non-ionizable
Explanation
Answer: (a)
Q.6
Which statement is incorrect? [ CBSE PMT 2001]
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a) Ni(CO4) - Tetrahedral, paramagnetic
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b) [Ni(CN)4]2- - Square planar, diamagnetic
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c) Ni(CO)4 - tetrahedral, diamagnetic
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d)[NiCl4]2- - tetrahedral, paramagnetic
Explanation
Answer:(a)
Q.7
The formula, dichlorobis (urea) copper (II) is [ CBSE PMT 1997]
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a) [Cu{O=C(NH2}]Cl2
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b) [CuCl2{O=C(NH2)2}2]
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c) [Cu{O=C(NH2)2]Cl]Cl
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d) [CuCl2{O=C(NH2)2}2]
Explanation
Answer: (d)
Q.8
Oxidation state of the metal ion in the complex [fe(CN)6]3- is [ AMU 1997]
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a) +3
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b) -3
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c) +6
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d) -6
Explanation
Answer: (a)
Q.9
Which one of the following shows maximum paramagnetic character?
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a) [Cr(H2O)6]3+
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b) [Fe(CN)6]4-
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c) [Fe(CN)6]3-
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d) [Cu(H2O)6]2+
Explanation
Only Cr have three unpaired electrons hence paramagnetic Answer: (a)
Q.10
in which of the following compound transition metal has zero oxidation state? [ CBSE PMT 1999]
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a) CrO5
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b) [Ni(NH2 . NH2)2]2+
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c) Co(ClO4)2
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d) [Fe(CO)5]
Explanation
fe oxidation state is zero as Co is neutral molecule Answer:(d)
Q.11
Which of the following will exhibit maximum ionic conductivity? [ CBSE PMT 2001]
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a) K4[Fe(CN)6]
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b) [Co(NH3)6]Cl3
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c) [Cu(NH3)4]Cl2
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d) [Ni(CO)4]
Explanation
K4[Fe(CN)6] gives ionizes to give five ions giving maximum conductivity Answer:(a)
Q.12
Which of the following is paramagnetic? [ BHU 1997]
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a) [Co(NH3)6]3+
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b) [Ni(CO)4]
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c) [Ni(NH3)4]2+
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d) [Ni(CN)4]2-
Explanation
Ni contain one unpaired electron in p orbital Answer: (c)
Q.13
Cobalt is present in ..[CPMT 2003]
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a) Vitamin B1
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b) Vitamin B2
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c) Vitamin B6
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d) Vitamin B12
Explanation
Answer: (d)
Q.14
Which of the following will give four isomers? [ CBSE PMT 2000]
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a) [Co(en)(NH3)2Cl2]Cl
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b) [Co(PPh3)2(NH3)2Cl2]Cl
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c) [Co(en)3]Cl3
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d) [Co(en)2Cl2]Br
Explanation
[Co(en)2Cl2]Br show cis- trans- isomers and optical isomerism Answer: (d)
Q.15
A complex compound of cobalt has molecular formula containing five NH3 molecules, one nitro group and two chlorine atoms for one Co atom. one mole of this compound produces three mole ions in aqueous solution, two moles of AgCl get precipitate. the ionic formula of the compound is ..[ CBSE PMT 1998]
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a) [Co(NH3)4 NO2Cl] [(NH3)Cl]
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b) [Co(NH3)5Cl] [Cl(NO)2]
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c) [Co(NH3)5 (NO2)]Cl2
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d)[Co(NH3)5] [(NO2)Cl2 ]
Explanation
Answer:(c)
Q.16
The coordination and oxidation number of X in the compound respectively are [ X(SO4)(NH3)5]Cl will be [JIPMER 1997]
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a) 10 and 3
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b) 6 and 4
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c) 2 and 6
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d) 6 and 3
Explanation
Answer: (d)
Q.17
The geometry of Ni(CO)4 and Ni(PPh3)2Cl2 are [IIT 1999]
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a) Both square planar
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b) tetrahedral and square planar
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c) Both tetrahedral
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d) Square planar and tetrahedral
Explanation
The spectrochemical series is an experimentally determined series. It is difficult to explain the order as it incorporates both the effect of σ and π bonding. A pattern of increasing σ donation is as follows Halides donors < O donors < N donors < C donors IN Ni(CO)4, CO is neutral and strong liagnd nickel is present in zero oxidation state {Ni = 3d8 4s2} CO is strong legand pushed 4s electron with unpaired 3d orbital to vacate 4s orbital CO electron pairs occupy 4S and 3p orbital. Thus have sp3 hybridization. In Ni(PPh3)2Cl2 (PPh3)Triphenylphosphine (IUPAC name: triphenylphosphane) is a common organophosphorus compound with the formula P(C6H5)3, weak liagnd forms only σ bond, neutral ligand Cl is weak liagnd; negative ligand Now oxidation state of Ni is +2 configuration is Ni =3d8, So one s- orbital is vacant and three p-prbitals vacant, sp3 hybridization sp3 hybridization gives tetrahedral structure Answer: (c)
Q.18
The number of isomers exhibited by [Cr(NH3)3Cl3Cl3] is ..[ Kerala MEE 2000]
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a) 2
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b) 4
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c) 3
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d) 6
Explanation
[Cr(NH3)3Cl3Cl3] forms two isomers fac and mer iosomers Answer: (a)
Q.19
the priomary valency of iron in K4[Fe(CN)6] is ..[ kerala MEE 2001]
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a) 1
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b) 2
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c) 3
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d) 6
Explanation
Answer:(b)
Q.20
Which of the following has square planar structure? [ BHU 1997]
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a) [NiCl4]2-
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b) [Ni(CO)4]0
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c) [Ni(CN)4]2-
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d) None of these
Explanation
Answer: (c)
Q.21
In [Cr(C2O4)3]3-, isomerism shown is [ AIEEE 2001]
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a) Ligand
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b) Optical
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c) geometrical
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d) Ionization
Explanation
Answer: (b)
Q.22
An example for double salt is [KCET 2002]
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a) Curammonium sulphate
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b) Mohr's salt
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c) Potassium ferricyanide
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d) Cobalthexammine chloride
Explanation
Answer: (b)
Q.23
Ammonia forms the complex ion [Cu(NH3)4]2+ with copper ions in alkaline solution but not in acidic solutions. What is the reason for it? [AIEEE2003]
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a) In acidic solutions, protons coordinate with ammonia molecules forming NH4+ ions and NH3 molecules are not available
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b) In alkaline solutions insoluble Cu(OH)2 is precipitated which is soluble in excess of any alkali
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c) Copper hydroxide is an amphoteric substance
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d) In acidic solutions hydration protects copper ions
Explanation
Answer:(a)
Q.24
The complex used as an anticancer agent is [ AIIMS 2003]
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a) mer-[Co(NH3)3Cl3]
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b) cis-[PtCl2(NH3)2]
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c) cis-K2[PtCl2Br2]
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d) Na2CoCl4
Explanation
Answer: (b)
Q.25
Consider the following complex [Co(NH3)5CO3]ClO4 The coordination number, oxidation number, number of d-electrons and number of unpaired d-electrons on the metal are, respectively...[SCRA 2001]
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a) 6, 3, 6, 0
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b) 7, 2, 7, 1
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c) 7, 1, 6, 4
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d) 6, 2, 7, 3
Explanation
Answer: (a)
Q.26
The most stable complex among the following is [ MPPMT 2002]
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a) K3[Al;(C2O4)3]
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b) [Pt(en)2]Cl2
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c) [Ag(NH3)2]Cl
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d) K2[Ni(EDTA)]
Explanation
There are five ring structure and thus it is most stable Answer: (d)
Q.27
The formula of ferrocene is ..[Haryana CEET 2003]
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a) [Fe(CN)6]3-
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b) [Fe(CN)6]4-
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c) [Fe(CO)5]
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d) [(C5H5)2Fe]
Explanation
Answer:(d)
Q.28
Potassium ferricyanide produces on ionization ..[CPMT 2003]
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a) 2 ions
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b) 1 ion
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c) 3 ions
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d) 4 ions
Explanation
Answer: (d)
Q.29
The geometry of the compound [Pt(NH3)2Cl2] is [ DEC 2001]
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a) Square planar
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b) Pyramidal
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c) tetrahedral
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d) Octahedral
Explanation
Answer: (a)
Q.30
The hypothetical complex chlorodiaquatriamminecobalt(III) chloride can be represented as [ CBSE PMT 2002]
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a) [CoCl(NH3)3(H2O)2]Cl2
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b) [Co(NH3)3(H2O)Cl3]
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c) [Co(NH3)3(H2O)2Cl]
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d) [Co(NH3)3(H2O)3]Cl3
Explanation
Answer: (a)
0 h : 0 m : 1 s
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