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NEET Chemistry MCQ
Coordination Compounds Mcq Neet Chemistry
Quiz 2
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Q.1
Some salts although containing two different metallic elements give test for only one of them in solution. Such salts are ..[AIIMS 2001]
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a) Complex salts
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b) Double salts
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c) Normal salts
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d) None
Explanation
Metal atom in the complex part does not give its test Answer: (a)
Q.2
The hybridization state of Fe in [Fe(H2O)5NO]SO4 is ..[At no Fe=26] [BHU 1994]
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a) dsp2
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b) sp3d
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c) sp3d2
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d) d2sp3
Explanation
H2O and NO are neutral ligands oxidation state of Fe = 2 Fe:1s2 2s2 2p6 3s2 3p6 4s2 3d6 Fe2+:1s2 2s2 2p6 3s2 3p6 3d6 So 4s2 electrons are missing one ligand can go in 3d have only six electron and only one paired, while 4 are unpaired NO is strong ligand and will pair unpaired electron producing two vacant orbitals in d And balnce three orbitals are vacant In this way six ligands are accommodated 2 pairs in 3d , one pair electrons in 4s, three pair electrons in 4p So will produce d2sp3 hybridization Note: NO can be either neutral , +1 or -1 If we take NO to be +Ve, then Fe Oxidation state becomes +1, which is highly unstabel, stable oxidation states of Fe are +2, +3 and 4s will have one electron. If we take NO to be -ve, then Fe oxidation state become +3, which gives hybridization is d3sp2, as 3d electron will go to 5s, and d3sp2 not possible Answer: (d)
Q.3
The number of unpaired electrons in Ni(CO)4 is /are .. [ AIIMS 1997]
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a) Zero
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b) One
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c) Four
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d) Five
Explanation
Ni)CO)4 has d10 electrons in 3d orbitals and thus zero unpaired electron Answer: (a)
Q.4
[Co(NH3)4Cl2]NO2 and [Co(NH3)4ClNO2]Cl exhibit which type of isomerism? [ MP PMT 1993]
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a) Geometrical
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b) Optical
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c) Linkage
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d) Ionisation
Explanation
Answer:(d)
Q.5
Which of the following ligands is a bidentate? [ Pb. CET 1991]
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a) EDTA
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b) Ethylenediamine
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c) Acetate
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d) Pyridine
Explanation
Answer: (b)
Q.6
Which of the following is square planar [ AtNo Ni =28]? [ BHU 1994]
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a) [Ni(CN)4]2-
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b) [NiCl4]2
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c) SO42-
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d) PO43-
Explanation
Answer: (a)
Q.7
In the metal carbonyls of the general formula M(CO)x where M = metal; x=4, the metal is bonded to [ CBSE PMT 1995]
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a) Carbon and oxygen
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b) Carbon
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c) Oxygen
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d) C-O triple bond
Explanation
In M(CO)4, M is bonded M-CΞO Answer: (d)
Q.8
the effective atomic number of Cr(atomic no. 24) in [Cr(NH3)6]Cl3 is [ BHU 1993]
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a) 35
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b) 27
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c) 33
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d) 36
Explanation
Effective atomic number Number of electrons in Cr3+ = 24-3 = 21 number of electrons donated by ligands = 2×6 = 12 Thus EAN = 21+12 = 33 Answer:(c)
Q.9
A solution of potassium ferrocyanide would contain ...ions [ 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) 5
Explanation
K4[Fe(CN)6] ionises to give 4+1= 5 ions Answer: (d)
Q.10
The formula of sodium nitroprusside is [ AIIMS 1994]
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a) Na4[Fe(CN)5NOS]
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b) Na2[Fe(CN)5NO]
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c) NaFe[Fe(CN)6]
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d) Na2[Fe(CN)6NO2]
Explanation
Answer: (b)
Q.11
Oxidation state of Cr in CrO5 is.. [Pb CET 1995]
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a) 4
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b) 2
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c) 10
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d) 6
Explanation
Compound contain two peroxide group and one oxide group as [Cr(O2)2O] Answer: (d)
Q.12
[Co(NH3)5Br]SO4 and [Co(NH3)5]br are examples of which type of isomerism? [ MP PMT 1992]
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a) linkage
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b) Geometrical
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c) Ionisation
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d) Optical
Explanation
Answer:(c)
Q.13
A group of atoms can function as a ligand only when [ KCET 1989]
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a) It is small molecule
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b) It has a unshared electron pair
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c) It is negatively charged ion
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d) It is a positively charge ion
Explanation
Ligand must have an unshared pair of electrons but exceptions are C2H4, C6H6 etc. Answer: (b)
Q.14
IUPAC name of [Pt(NH3)3Br(NO2)Cl]Cl is [CBSE PMT 1998]
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a) Triamminechlorobromonitroplatinum(IV)chloride
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b) Triamminebromonitrochloroplatinum(IV)chloride
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c) Triamminebromochloronitroplatinum(IV)chloride
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d) Triamminenitrochlorobromoplatinum(IV)chloride
Explanation
Answer: (c)
Q.15
Which is the shape of Fe(CO)2 molecule? [ CBSE PMT 2009]
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a) tetrahedral
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b) Octahedral
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c) Trigonal bipyramidal
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d) Square pyramidal
Explanation
Fe atom is dsp3 hybridized given by a trigonal bipyramidal structure Answer: (c)
Q.16
Which of the following compound is not coloured? [ AIIMS 1997]
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a) Na2[CuCl4
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b) Na[CdCl4]
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c) K4[Fe(CN)6]
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d) K3[Fe(CN)6]
Explanation
Cd in Na[CdCl4] have electron configuration asd10 Answer:(b)
Q.17
The oxidation state of Fe in brown ring complex [Fe(H2O)5NO] is [ CBSE PMT 1997]
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a) 2
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b) 4
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c) 3
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d) 0
Explanation
H2O anda NO (Nitrosyl) are neutral ligands brown ring complex [Fe(H2O)5NO]SO4 SO4 is -2 Fe +0 +0 - 2= 0 Fe =+2 Note: NO can be either neutral , +1 or -1 If we take NO to be +Ve, then Fe Oxidation state becomes +1, which is highly unstabel, stable oxidation states of Fe are +2, +3 and 4s will have one electron. If we take NO to be -ve, then Fe oxidation state become +3, which gives hybridization is d3sp2, as 3d one electron will go to 5s, and d3sp2 not possible Answer: (a)
Q.18
Which of the following complex will give white precipitate with BaCl2(aq) [ JIPMER 1997]
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a) [Cr(NH3)5SO4]Cl
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b) [Co(NH2)4SO4]NO2
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c) [Cr(NH3)5Cl]SO4
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d) Both (a) and (b)
Explanation
BaCl2 gives white precipitate with SO42- ions Answer: (c)
Q.19
Ni(CO)4 contains hybridization as [ Haryana CEET 1998]
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a) sp3
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b) dsp2
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c) sp3d
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d) sp3d2
Explanation
Answer: (a)
Q.20
IUPAC name of Na2[Co(NO2)6] is ..[MPPMT 2000]
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a) Sodium cobaltnitrite
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b) Sodium hexanitrito cobaltate(III)
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c) Sodium hexanitro cobalt(III)
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d) Sodium hexanitro cobaltate(III)
Explanation
Answer:(d)
Q.21
The coordinatetion number of Fe(II) in oxyhaemoglobin is ..[EAMCET 2001]
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a) 6
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b) 4
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c) 8
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d) 10
Explanation
Answer: (a)
Q.22
CuSO4 reacts with KCN solution and forms..[AIIMS 1999]
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a) Cu(CN)
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b) Cu(CN)2
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c) K3[Cu(CN)4]
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d) K4[Cu(CN)6]
Explanation
2CuSO4 + 10KCN → 2K3[Cu(CN)4] + (CN)2 +2 K2SO4 Answer: (c)
Q.23
For the square planar complex [M(a)(b)(c)(d)] Where M is central metal and a, b, c, d are monodentate ligands. the number of possible geometrical isomers are [ kerala MEE 2000]
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a) 1
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b) 2
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c) 3
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d) 4
Explanation
We can findind only three isomers by interchaging position of ligands Answer: (c)
Q.24
In [Co(NH3)6]Cl3, the number of covalent bonds is ..[MP PMT2001]
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a) 3
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b) 6
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c) 9
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d) 18
Explanation
Each Nh3 contains three covalent bonds thus total 18 covalent bonds Answer:(d)
Q.25
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.26
What is the oxidation number of Co in [Co(NH3)4Cl(NO2)] [ BHU 1999]
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a) +2
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b) +3
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c) +4
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d) +5
Explanation
Let Co oxidation state be x x + 4 ×0 + 1×(-1) + 1×(-1) = 0 ∴ x = +2 Answer: (a)
Q.27
the correct order of hybridization of the central atom in the following species NH3, [PtCl4]2-, PCl5 and BCl3 is [AtNo pt=78] [ IIT screening test 2001]
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a) dsp2, ds3, sp2 and sp3
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b) sp3, dsp2, dsp3, sp2
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c) dsp2, sp2, sp3, dsp3
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d) dsp2, sp3, sp2, dsp3
Explanation
Answer: (b)
Q.28
The oxidation number of cobalt in K[Co(CN)4] is ..[MP PMT 2001]
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a) +1
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b) +2
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c) -3
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d) +3
Explanation
Answer:(d)
Q.29
Which of the following is an organometallic compound? [ IIT 1997]
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a) Lithium methoxide
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b) Lithium acetate
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c) Lithium dimethylamide
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d) Methyl lithium
Explanation
Answer: (d)
Q.30
AgCl precipitate dissolves in NH4OH due to the formation of ..[CBSE PMT 1998]
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a) [Ag(NH4)2]Cl
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b) [Ag(NH4)2]Cl2
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c) [Ag(NH3)2]Cl
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d) [Ag(NH3)2]Cl
Explanation
AgCl + 2NH4OH → [Ag(NH3)2]Cl Answer: (c)
0 h : 0 m : 1 s
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