Class 12 Chemistry Ch-9 Coordination Compounds MCQs Exam 2027 
Class 12 Chemistry Ch-9 Coordination Compounds MCQs Exam 2027 MCQs Exam 2027 Details: नीचे दिए गए सभी Questions Bihar Board परीक्षा 2027 के लिए “Very Very Important Multiple Choice Questions (MCQs) Objective” (अत्यंत महत्वपूर्ण प्रश्न) हैं। इन सभी Class 12th Chemistry /रसायन विज्ञानं ) = रसायन विज्ञानं भाग-1 (English Medium) Book Chapter-9 Coordination Compounds का Questions का Solve का वीडियो Youtube और Website पर Upload किया है।
Topic 1: Basic Concepts & Double Salts
An example of a neutral ligand is: [BSEB, 2021 A]
(A) Cyanide group
(B) Halogen group
(C) Nitro group
(D) Water molecule
$K_3[Fe(CN)_6]$ is a/an: [BSEB, 2019 A]
(A) Double salt
(B) Coordination compound
(C) Acidic salt
(D) Simple compound
Potash alum is an example of: [BSEB, 2011 A]
(A) Salt
(B) Simple salt
(C) Double salt
(D) Complex salt
The formula of Mohr’s salt is: [BSEB, 2015 A]
(A) $FeSO_4 \cdot 7H_2O$
(B) $FeSO_4 \cdot (NH_4)_2SO_4 \cdot 6H_2O$
(C) $FeSO_4 \cdot (NH_4)_2 SO_4 \cdot 6H_2O$
(D) $FeSO_4 \cdot 5H_2O$
Which of the following is an example of a double salt? [BSEB, 2023 A]
(A) Bleaching powder
(B) $K_4[Fe(CN)_6]$
(C) Hypo
(D) Potash alum
The aqueous solution of Potash alum is: [BSEB, 2017 C]
(A) Acidic in nature
(B) Basic in nature
(C) Neutral in nature
(D) Amphoteric in nature
An example of a double salt is: [BSEB, 2023 A]
(A) $K_4[Fe(CN)_6]$
(B) Carnallite ($KCl \cdot MgCl_2 \cdot 6H_2O$)
(C) $CuSO_4 \cdot 5H_2O$
(D) $NaCl$
Potassium ferrocyanide is a: [BSEB, 2011 A]
(A) Simple salt
(B) Complex salt
(C) Double salt
(D) Acidic salt
Topic 2: Classification of Ligands
Ethylenediamine tetraacetate ion ($EDTA^{4-}$) is a: [BSEB, 2022 A]
(A) Unidentate ligand
(B) Bidentate ligand
(C) Hexadentate ligand
(D) Tridentate ligand
Ethylenediamine is: [BSEB, 2021 A]
(A) Unidentate ligand
(B) Bidentate ligand
(C) Tridentate ligand
(D) Ambidentate ligand
Which of the following ligands forms a Chelate? [BSEB, 2021 A]
(A) $Cl^-$
(B) Oxalate
(C) $NH_3$
(D) $CN^-$
All ligands are: [BSEB, 2022 A]
(A) Lewis acids
(B) Lewis bases
(C) Neutral
(D) None of these
Ligands are capable of donating at least: [BSEB, 2019 C]
(A) One pair of electrons
(B) One electron
(C) Three electrons
(D) All of these
An example of a positive ligand is: [BSEB, 2011 A]
(A) $NH_2 – NH_2$
(B) $NH_2 – NH_3^+$
(C) $NH_2^-$
(D) Different from these
Which of the following is a bidentate ligand? [BSEB, 2023 A]
(A) E.D.T.A.
(B) Ethylenediamine
(C) Acetate ion
(D) Pyridine
An example of the weakest ligand is: [BSEB, 2021 A]
(A) $Cl^-$
(B) $OH^-$
(C) $CN^-$
(D) $SO_4^{2-}$
Which of the following ligands is unidentate? [BSEB, 2021 A]
(A) Ethylenediamine
(B) Oxalate ion
(C) Ammonia ($NH_3$)
(D) EDTA
Which of the following is the strongest ligand? [BSEB, 2021 A]
(A) $F^-$
(B) $Cl^-$
(C) $CN^-$
(D) $OH^-$
An example of an ambidentate ligand is: [BSEB, 2022 A]
(A) $H_2O$
(B) $NH_3$
(C) $SCN^-$
(D) $C_2O_4^{2-}$
A ligand must have at least how many lone pairs of electrons? [BSEB, 2020 A]
(A) 1
(B) 2
(C) 3
(D) 4
Which of the following ligands is neutral? [BSEB, 2017 C]
(A) $CN^-$
(B) $OH^-$
(C) $CO$ (Carbonyl)
(D) $Cl^-$
The denticity of $EDTA^{4-}$ is: [BSEB, 2022 A]
(A) 2
(B) 4
(C) 6
(D) 1
Ethylenediamine ($en$) is which type of ligand? [BSEB, 2018 A]
(A) Negative
(B) Neutral
(C) Positive
(D) Acidic
Which of the following ligands forms a chelate ring? [BSEB, 2023 A]
(A) $NH_3$
(B) Oxalate
(C) $H_2O$
(D) $Cl^-$
Topic 3: Coordination Number & Oxidation State
The oxidation number of Nickel in $[Ni(CO)_4]$ is: [BSEB, 2009 A]
(A) Zero
(B) +4
(C) +2
(D) -4
The oxidation state of Chromium in $[Cr(CO)_6]$ is: [BSEB, 2021 A]
(A) +6
(B) +4
(C) 0
(D) +3
The coordination number of $Cr$ in $K_3[Cr(Ox)_3]$ is: [BSEB, 2017 A]
(A) 6
(B) 5
(C) 4
(D) 3
The oxidation number of Cobalt in $K[Co(CO)_4]$ is: [BSEB, 2021 A]
(A) +1
(B) +3
(C) -1
(D) -2
The coordination number of $Cr$ in $Na_3[Cr(C_2O_4)_3]$ is: [BSEB, 2020 A]
(A) 3
(B) 4
(C) 5
(D) 6
The oxidation number of $Cr$ in $[Cr(H_2O)_4Cl_2]^+$ complex is: [BSEB, 2021 A]
(A) +1
(B) +3
(C) +5
(D) +6
The oxidation number of $Pt$ in $[Pt(C_2H_4)Cl_3]^-$ is: [BSEB, 2023 A]
(A) +1
(B) +2
(C) +3
(D) +4
The oxidation state of Nickel in $K_4[Ni(CN)_4]$ is: [BSEB, 2021 A]
(A) 0
(B) +1
(C) +2
(D) -1
The coordination number of $Ni$ in $[Ni(C_2O_4)_3]^{4-}$ is: [BSEB, 2024 A]
(A) 3
(B) 6
(C) 4
(D) 5
The oxidation state of $Fe$ in $[Fe(H_2O)_5NO]SO_4$ is: [BSEB, 2018 A]
(A) +1
(B) +2
(C) +3
(D) +4
The oxidation number of $Fe$ in $K_4[Fe(CN)_6]$ is: [BSEB, 2019 A]
(A) +2
(B) +3
(C) -2
(D) -3
The coordination number of $Cr$ in $K_3[Cr(C_2O_4)_3]$ is: [BSEB, 2021 A]
(A) 3
(B) 4
(C) 5
(D) 6
An example of a complex having coordination number six (6) is: [BSEB, 2021 A]
(A) $[Ni(CO)_4]^0$
(B) $[Cu(NH_3)_4]SO_4$
(C) $[Fe(CO)_5]^0$
(D) $[Co(NH_3)_6]Cl_3$
The coordination number of $Pt$ in $[Pt(NH_3)_6]^{4+}$ is: [BSEB, 2023 A]
(A) 2
(B) 4
(C) 6
(D) 8
The coordination number of Iron (Fe) in $K_4[Fe(CN)_6]$ is: [BSEB, 2012 A]
(A) 4
(B) 6
(C) 3
(D) 2
The coordination number of Cobalt in $[Co(en)_3]Cl_3$ is: [BSEB, 2017 A]
(A) 3
(B) 4
(C) 6
(D) 5
The oxidation state of Cu in $[Cu(NH_3)_4]^{2+}$ is: [BSEB, 2018 A]
(A) +1
(B) +2
(C) +3
(D) 0
The Effective Atomic Number (EAN) of Fe in $[Fe(CN)_6]^{3-}$ is: [BSEB, 2018 A]
(A) 36
(B) 35
(C) 34
(D) 37
The oxidation state of Iron in $K_3[Fe(CN)_6]$ is: [BSEB, 2019 A]
(A) +2
(B) +3
(C) +4
(D) 0
The coordination number of Fe in $[Fe(C_2O_4)_3]^{3-}$ is: [BSEB, 2021 A]
(A) 3
(B) 6
(C) 4
(D) 5
The oxidation state of Cr in $[Cr(NH_3)_4Cl_2]Cl$ is: [BSEB, 2021 A]
(A) +2
(B) +3
(C) +1
(D) 0
The coordination number of Cobalt in $[Co(NH_3)_5(CO_3)]Cl$ is: [BSEB, 2024 A]
(A) 5
(B) 6
(C) 4
(D) 7
The coordination number of Ag in $[Ag(CN)_2]^-$ is: [BSEB, 2024 A]
(A) 2
(B) 4
(C) 6
(D) 1
The oxidation number of Cobalt in $[Co(NH_3)_5Cl]^{2+}$ is: [BSEB, 2019 A]
(A) +2
(B) +3
(C) +1
(D) +4
(2026) The oxidation state of Ni in $Ni(CO)_{4}$ is: [BSEB, 2026]
(A) +4
(B) +3
(C) +2
(D) 0
Topic 4: IUPAC Naming
The IUPAC name of $[Ni(CO)_4]$ is: [BSEB, 2021 A]
(A) Tetracarbonylnickellate (II)
(B) Tetracarbonylnickel (II)
(C) Tetracarbonylnickel (0)
(D) Tetracarbonylnickel (O)
The IUPAC name of $[Co(NH_3)_6]Cl_3$ is: [BSEB, 2025 A]
(A) Hexaamminecobalt (III) chloride
(B) Hexaamminecobalt (II) chloride
(C) Hexaamminetrichloridocobalt (III)
(D) None of these
The IUPAC name of $K_3[Fe(CN)_6]$ is: [BSEB, 2024 A]
(A) Potassium ferrocyanide
(B) Potassium ferricyanide
(C) Potassium hexacyanoferrate (II)
(D) Potassium hexacyanoferrate (III)
The IUPAC name of $H_2[PtCl_6]$ is: [BSEB, 2018 A]
(A) Hydrogen hexachloroplatinic (IV) acid
(B) Hydrogen hexachloroplatinate (II)
(C) Hydrogen hexachloroido Pt (IV)
(D) Hydrogen hexachloroido Pt (II)
The molecular formula of Potassium hexacyanoferrate (II) is: [BSEB, 2012 A]
(A) $K_3[Fe(CN)_6]$
(B) $K_4[Fe(CN)_6]$
(C) $K_2[Fe(CN)_6]$
(D) $K[Fe(CN)_6]$
The correct formula for Hexaammineplatinum (IV) chloride is: [BSEB, 2021 A]
(A) $[Pt(NH_3)_6]Cl_4$
(B) $[Pt(NH_3)_6]Cl_2$
(C) $[Pt(NH_3)_2]Cl_3$
(D) $[Pt(NH_3)_4]Cl_4$
The IUPAC name of $[Ni(Cl)_4]^{2-}$ is: [BSEB, 2024 A]
(A) Tetrachloronickel (II) ion
(B) Tetrachloronickellate (0) ion
(C) Tetrachloronickellate (II) ion
(D) Nickel tetrachloride ion
The IUPAC name of $K_2[Ni(CN)_4]$ is: [BSEB, 2021 A]
(A) Potassium tetracyanonickel (II)
(B) Potassium tetracyanonickellate (II)
(C) Potassium tetracyanonickellate (0)
(D) Tetracyanopotassium nickellate (II)
The formula for Hexaaquamanganese (II) ion is: [BSEB, 2021 A]
(A) $[Mn(H_2O)_6]^{2+}$
(B) $[Mn(H_2O)_4]^{2+}$
(C) $[Mn(H_2O)_6]^{3+}$
(D) $[Mn(CN)_6]^{4-}$
The name of $K_2[PtCl_6]$ is: [BSEB, 2012 A]
(A) Potassium hexachloroplatinate (IV)
(B) Potassium hexachloroplatinate (II)
(C) Potassium chloroplatinate
(D) None of these
The correct IUPAC name of $[Cr(H_2O)_4Cl_2]Cl$ is: [BSEB, 2023 A]
(A) Tetraaquadichloridochromium (III) chloride
(B) Tetraaquadichloridochromium (II) chloride
(C) Chloridochromium tetraaqua chloride
(D) None of these
The IUPAC name of $K_3[Al(C_2O_4)_3]$ is: [BSEB, 2021 A]
(A) Potassium aluminate
(B) Potassium trioxalatoaluminate (III)
(C) Potassium aluminium oxalate
(D) Aluminium potassium oxalate
The name of $[Pt(NH_3)_2Cl_2]$ is: [BSEB, 2016 A]
(A) Diamminedichloridoplatinum (II)
(B) Diamminedichloridoplatinum (IV)
(C) Dichloroplatinum diammine
(D) None of these
Topic 5: Isomerism
How many geometrical isomers are possible for $[Pt(NH_3)_2Cl_2]$? [BSEB, 2024 A]
(A) 2
(B) 3
(C) 4
(D) 0
$[Co(NH_3)_5Br]SO_4$ and $[Co(NH_3)_5SO_4]Br$ are which type of isomers? [BSEB, 2022 A]
(A) Ionization isomers
(B) Linkage isomers
(C) Coordination isomers
(D) Geometrical isomers
Which of the following cannot show linkage isomerism? [BSEB, 2025 A]
(A) $NO_2^-$
(B) $SCN^-$
(C) $CN^-$
(D) $NH_3$
How many geometrical isomers of the complex $[Co(NH_3)_4Cl_2]Cl$ are possible? [BSEB, 2015 A]
(A) 2
(B) 3
(C) 4
(D) 1
How many possible isomers are there for the complex compound $[Co(C_2O_4)_2(NH_3)_2]$? [BSEB, 2011 A]
(A) 1
(B) 2
(C) 3
(D) 4
The complex ion which shows coordination isomerism is: [BSEB, 2020 A]
(A) $[Co(NH_3)_6][Cr(CN)_6]$
(B) $[Co(NH_3)_5Cl]Cl_2$
(C) $[Pt(NH_3)_2Cl_2]$
(D) $[Ni(CO)_4]$
How many ionization isomers are possible for $[Co(NH_3)_4Cl_2]Cl$? [BSEB, 2022 A]
(A) 2
(B) 1
(C) 3
(D) 4
Which of the following shows optical isomerism? [BSEB, 2018 A]
(A) $[Co(en)_3]^{3+}$
(B) $[Zn(en)_2]^{2+}$
(C) $[Co(NH_3)_6]^{3+}$
(D) $[Cu(NH_3)_4]^{2+}$
The number of geometrical isomers of the complex ion $[Cr(C_2O_4)_2(H_2O)_2]^-$ is: [BSEB, 2021 A]
(A) 2
(B) 3
(C) 4
(D) 1
(2026) $[Co(NH_{3})_{5}Br]SO_{4}$ and $[Co(NH_{3})_{5}SO_{4}]Br$ are related as: [BSEB, 2026]
(A) Ionization isomers
(B) Linkage isomers
(C) Coordination isomers
(D) Geometrical isomers
Topic 6: Bonding (VBT & CFT)
The geometry of $[Ni(CO)_4]$ is: [BSEB, 2009 A]
(A) Tetrahedral
(B) Square-planar
(C) Octahedral
(D) None of these
The hybridization of $Fe$ in $K_4[Fe(CN)_6]$ is: [BSEB, 2011 A]
(A) $dsp^2$
(B) $sp^3$
(C) $d^2sp^3$
(D) $sp^3d^2$
The shape of the complex ion $[Ni(CN)_4]^{2-}$ is: [BSEB, 2025 A]
(A) Linear
(B) Tetrahedral
(C) Square planar
(D) Octahedral
The hybridization of the central metal in which compound is $dsp^2$? [BSEB, 2018 C]
(A) $[Fe(CO)_5]$
(B) $[Ni(CO)_4]$
(C) $[Ni(CN)_4]^{2-}$
(D) $[Cr(H_2O)_6]^{3+}$
What is the hybridization of Nickel in $[Ni(CN)_4]^{2-}$? [BSEB, 2019 A]
(A) $sp^3$
(B) $dsp^2$
(C) $d^2sp^3$
(D) $sp^3d^2$
What is the hybridization of $Fe$ in $K_3[Fe(CN)_6]$? [BSEB, 2015 A]
(A) $sp^3$
(B) $dsp^2$
(C) $d^2sp^3$
(D) $sp^3d^2$
The geometry of complex ion $[Cu(NH_3)_4]^{2+}$ is square planar, then hybridization of $Cu^{2+}$ is: [BSEB, 2016 A]
(A) $sp^3$
(B) $sp^3d^2$
(C) $dsp^2$
(D) $dsp^3$
The structure of $[NiCl_4]^{2-}$ is: [BSEB, 2012 A]
(A) Square planar
(B) Tetrahedral
(C) Octahedral
(D) Linear
Which of the following has tetrahedral shape: [BSEB, 2012 A, 2018 A]
(A) $[Ni(CN)_4]^{2-}$
(B) $[Pd(CN)_4]^{2-}$
(C) $[PdCl_4]^{2-}$
(D) $[NiCl_4]^{2-}$
Which of the following is an inner orbital complex ion? [BSEB, 2021 A]
(A) $[Fe(CN)_6]^{4-}$
(B) $[Fe(NH_3)_6]^{3+}$
(C) $[FeF_6]^{3-}$
(D) None of these
The geometry of $[Ag(NH_3)_2]^+$ ion is: [BSEB, 2016 A]
(A) Linear
(B) Square planar
(C) Tetrahedral
(D) Octahedral
Which of the following complexes is an outer orbital complex? [BSEB, 2024 A]
(A) $[Fe(CN)_6]^{3-}$
(B) $[Co(NH_3)_6]^{3+}$
(C) $[CoF_6]^{3-}$
(D) $[Mn(CN)_6]^{3-}$
The geometry of $[Ni(NH_3)_6]^{2+}$ is: [BSEB, 2021 A]
(A) Tetrahedral
(B) Square planar
(C) Octahedral
(D) Linear
The hybridization of Mn in $[Mn(CN)_6]^{4-}$ is: [BSEB, 2021 A]
(A) $sp^3d^2$
(B) $d^2sp^3$
(C) $dsp^2$
(D) $sp^3$
The geometry having $dsp^2$ hybridization is: [BSEB, 2020 A]
(A) Tetrahedral
(B) Square planar
(C) Octahedral
(D) Trigonal bipyramidal
According to CFT, the splitting of $d$-orbitals for octahedral complexes occurs in which two groups? [BSEB, 2020 A]
(A) $t_{2g}$ and $e_g$
(B) $s$ and $p$
(C) $d_{xy}$ and $d_{yz}$
(D) None of these
The value of $\Delta_0$ (Octahedral crystal field splitting energy) will be maximum for: [BSEB, 2022 A]
(A) For $F^-$
(B) For $Cl^-$
(C) For $CN^-$
(D) For $H_2O$
The $\Delta_0$ of which of the following ligands is minimum? [BSEB, 2021 A]
(A) $CO$
(B) $NH_3$
(C) $CN^-$
(D) $F^-$
Topic 7: Magnetic Properties & Color
Which of the following is paramagnetic? [BSEB, 2022 A]
(A) $Ni(CO)_4$
(B) $[Ni(CN)_4]^{2-}$
(C) $[NiCl_4]^{2-}$
(D) $[Co(NH_3)_6]^{3+}$
Which of the following ions is colorless? [BSEB, 2021 A]
(A) $Cu^{2+}$
(B) $Ti^{3+}$
(C) $V^{3+}$
(D) $Sc^{3+}$
Which of the following complex compounds has the highest paramagnetic moment? [BSEB, 2018 A]
(A) $[Cr(H_2O)_6]^{3+}$
(B) $[Fe(H_2O)_6]Cl_2$
(C) $[Fe(CN)_6]^{4-}$
(D) $[Ni(CO)_4]$
What is the color of coordination compound $[Cu(NH_3)_4]^{2+}$? [BSEB, 2018 A]
(A) Blue
(B) Red
(C) Green
(D) Yellow
The number of unpaired electrons in hexacyanoferrate (III) ion $[Fe(CN)_6]^{3-}$ is: [BSEB, 2021 A]
(A) 0
(B) 1
(C) 2
(D) 3
The nature of $[Co(NH_3)_6]^{3+}$ ion is: [BSEB, 2022 A]
(A) Paramagnetic
(B) Diamagnetic
(C) Ferromagnetic
(D) None of these
Which of the following ions is diamagnetic? [BSEB, 2015 A]
(A) $[Fe(H_2O)_6]^{2+}$
(B) $[CoF_6]^{3-}$
(C) $[Ni(CN)_4]^{2-}$
(D) $[Cu(H_2O)_6]^{2+}$
The magnetic behavior of $[Ni(CN)_4]^{2-}$ ion is: [BSEB, 2022 A]
(A) Paramagnetic
(B) Diamagnetic
(C) Ferromagnetic
(D) None of these
What is the color of $[Fe(CN)_6]^{4-}$? [BSEB, 2019 C]
(A) Pale yellow
(B) Dark blue
(C) Red
(D) Green
The number of unpaired electrons in $[NiCl_4]^{2-}$ is: [BSEB, 2021 A]
(A) 0
(B) 2
(C) 4
(D) 3
The magnetic moment of $[Fe(H_2O)_6]^{2+}$ is approximately: [BSEB, 2024 A]
(A) 1.73 BM
(B) 2.83 BM
(C) 4.90 BM
(D) 5.92 BM
Topic 8: Stability & Theories
Which of the following is most stable? [BSEB, 2021 A]
(A) $[Fe(H_2O)_6]^{3+}$
(B) $[Fe(CN)_6]^{4-}$
(C) $[Fe(CN)_6]^{3+}$
(D) $[Fe(C_2O_4)_3]^{3-}$
Who gave the most important theory for coordination compounds? [BSEB, 2023 A]
(A) Slater
(B) Pauling
(C) Werner
(D) Lewis
According to Werner’s theory, secondary valency of metals is: [BSEB, 2018 A]
(A) Ionizable
(B) Non-ionizable
(C) Variable
(D) None of these
Which of the following does not follow the Effective Atomic Number (EAN) rule? [BSEB, 2023 A]
(A) $Fe(CO)_5$
(B) $[Ni(CO)_4]$
(C) $[Cu(NH_3)_4]^{2+}$
(D) $K_4[Fe(CN)_6]$
The primary valency of metals in coordination compounds is: [BSEB, 2020 A]
(A) Ionizable
(B) Non-ionizable
(C) Coordination
(D) Fixed
According to Werner’s theory of coordination compounds, secondary valency represents: [BSEB, 2018 C]
(A) Oxidation state
(B) Coordination number
(C) Charge
(D) Magnetic moment
Which of the following ions will form the most stable complex? [BSEB, 2021 A]
(A) $Cu^{2+}$
(B) $Ni^{2+}$
(C) $Fe^{2+}$
(D) $CO^{2+}$
Topic 9: Biological Importance & Applications
The main metal ion present in chlorophyll is: [BSEB, 2016 A, 2023 A]
(A) $Fe^{2+}$
(B) $Mg^{2+}$
(C) $Co^{2+}$
(D) $Zn^{2+}$
Vitamin $B_{12}$ contains: [BSEB, 2024 A]
(A) Cobalt
(B) Magnesium
(C) Iron
(D) Nickel
The transition metal which is used as a Ziegler-Natta catalyst is: [BSEB, 2019 C]
(A) $Ti$
(B) $Th$
(C) $Tl$
(D) $Te$
The complex used in the treatment of cancer is: [BSEB, 2024 A]
(A) $[Pt(NH_3)_4]Cl_2$
(B) Cis-platin $[Pt(NH_3)_2Cl_2]$
(C) Trans-platin
(D) $K_2[PtCl_4]$
The metal present in hemoglobin is: [BSEB, 2015 A]
(A) Iron (Fe)
(B) Magnesium (Mg)
(C) Cobalt (Co)
(D) Zinc (Zn)
The metal used in Wilkinson’s Catalyst is: [BSEB, 2020 A]
(A) $Pt$
(B) $Pd$
(C) $Rh$ (Rhodium)
(D) $Ir$
What is $K_2[HgI_4]$ called? [BSEB, 2018 C]
(A) Tollen’s reagent
(B) Nessler’s reagent
(C) Benedict’s solution
(D) Fehling’s solution
Which complex ion is formed in the extraction of silver? [BSEB, 2023 A]
(A) $[Ag(CN)_2]^-$
(B) $[Ag(NH_3)_2]^+$
(C) $[AgCl_2]^-$
(D) $[Ag(S_2O_3)_2]^{3-}$
(2026) Vitamin $B_{12}$ contains: [BSEB, 2026]
(A) Cobalt
(B) Magnesium
(C) Iron
(D) Nickel
Topic 10: Complexes & Reactions
The oxidation state of Ni in $Ni(CO)_4$ is: [BSEB, 2026]
(A) +4
(B) +3
(C) +2
(D) 0
The number of ions in the aqueous solution of $[Co(NH_3)_5Cl]Cl_2$ will be: [BSEB, 2021 A]
(A) 3
(B) 4
(C) 2
(D) 6
Which will give a white precipitate with $AgNO_3$ in aqueous solution? [BSEB, 2019 A]
(A) $[Co(NH_3)_6]Cl_3$
(B) $[Co(NH_3)_5Cl]Cl_2$
(C) $[Co(NH_3)_4Cl_2]Cl$
(D) All of these
The formula of Sodium nitroprusside is: [BSEB, 2017 A]
(A) $Na_2[Fe(CN)_5NO]$
(B) $Na_3[Fe(CN)_6]$
(C) $Na_4[Fe(CN)_6]$
(D) None of these
Reagent which is used for the identification of $Cu^{2+}$ ion: [BSEB, 2019 C]
(A) $NH_3$
(B) $K_4[Fe(CN)_6]$
(C) $NaOH$
(D) $H_2S$
Potash alum is an example of: [BSEB, 2011 A]
(A) Salt
(B) Simple salt
(C) Double salt
(D) Complex salt
What type of complex compound is $[Co(NH_3)_6]Cl_3$? [BSEB, 2017 C]
(A) Cationic complex compound
(B) Anionic complex compound
(C) Neutral complex compound
(D) None of these
Which of the following compounds is used in fire extinguishers? [BSEB, 2022 A]
(A) $CCl_4$
(B) $CHCl_3$
(C) $CH_3Cl$
(D) $COCl_2$
Which of the following has the highest molar conductivity in aqueous solution? [BSEB, 2024 A]
(A) $[Pt(NH_3)_6]Cl_4$
(B) $[Pt(NH_3)_5Cl]Cl_3$
(C) $[Pt(NH_3)_4Cl_2]Cl_2$
(D) $[Pt(NH_3)_3Cl_3]Cl$
In which of the following is Synergic Bonding found? [BSEB, 2021 A]
(A) Metal carbonyls
(B) Metal ammine complexes
(C) Hydrated salts
(D) None of these
Syllabus-based Remaining MCQs
Complexes are: [BSEB, 2015 A]
(A) Of one type
(B) Of two types
(C) Of three types
(D) Of four types
The complex ion in which the central metal atom has no $d$-electron: [BSEB, 2022 A]
(A) $[MnO_4]^-$
(B) $[Co(NH_3)_6]^{3+}$
(C) $[Fe(CN)_6]^{3-}$
(D) $[Cr(H_2O)_6]^{3+}$
Green vitriol is: [BSEB, 2015 A]
(A) $FeSO_4 \cdot 7H_2O$
(B) $CuSO_4 \cdot 5H_2O$
(C) $CaSO_4 \cdot 2H_2O$
(D) None of these
What will be the effective atomic number of cobalt in $[Co(en)_2Cl_2]^\oplus$ complex ion? [BSEB, 2017 A]
(A) 27
(B) 36
(C) 33
(D) 35
The effective atomic number of $Co$ in complex ion $[Co(en)_2Cl_2]^+$ is: [BSEB, 2025 A]
(A) 27
(B) 36
(C) 33
(D) 35
$K_4[Fe(CN)_6]$ is an example of: [BSEB, 2015 A]
(A) Ionic complex
(B) Molecular complex
(C) Bridge complex
(D) Different from these
The main use of T.E.L. (Tetra Ethyl Lead) is: [BSEB, 2017 C]
(A) As a polymer
(B) As an anti-knock compound
(C) As a heat insulator
(D) As a solvent
The coordination number of sodium in $Na_2O$ is: [BSEB, 2015 A]
(A) 6
(B) 4
(C) 8
(D) 2
Which of the following is an inner orbital complex? [BSEB, 2025 A]
(A) $[Co(NH_3)_6]^{3+}$
(B) $[Ni(NH_3)_6]^{2+}$
(C) $[Zn(NH_3)_6]^{2+}$
(D) $[FeF_6]^{3-}$
The number of ions in the solution of complex compound $[Co(NH_3)_5Cl]Cl_2$ is: [BSEB, 2026]
(A) 3
(B) 4
(C) 2
(D) 6
$[Co(NH_3)_5Br]SO_4$ and $[Co(NH_3)_5SO_4]Br$ are related to each other as: [BSEB, 2026]
(A) Ionization isomers
(B) Linkage isomers
(C) Coordination isomers
(D) Geometrical isomers
Vitamin $B_{12}$ contains: [BSEB, 2026]
(A) Cobalt
(B) Magnesium
(C) Iron
(D) Nickel
The oxidation state of Ni in $Ni(CO)_4$ is: [BSEB, 2026]
(A) +4
(B) +3
(C) +2
(D) 0
The number of ions in the aqueous solution of $[Co(NH_3)_5Cl]Cl_2$ is: [BSEB, 2026]
(A) 3
(B) 4
(C) 2
(D) 6
$[Co(NH_3)_5Br]SO_4$ and $[Co(NH_3)_5SO_4]Br$ are related to each other in what way? [BSEB, 2026]
(A) Ionization isomers
(B) Linkage isomers
(C) Coordination isomers
(D) Geometrical isomers
How many ions are obtained in the aqueous solution of $K_4[Fe(CN)_6]$? [BSEB, 2019 A]
(A) 4
(B) 5
(C) 3
(D) 1
What is the hybridization of $Fe$ in $[Fe(CN)_6]^{4-}$? [BSEB, 2011 A]
(A) $dsp^2$
(B) $sp^3$
(C) $d^2sp^3$
(D) $sp^3d^2$
Potash alum is an example of: [BSEB, 2011 A]
(A) Salt
(B) Simple salt
(C) Double salt
(D) Complex salt
The IUPAC name of $[Co(NH_3)_6]Cl_3$ is: [BSEB, 2025 A]
(A) Hexaamminecobalt (III) chloride
(B) Hexaamminecobalt (II) chloride
(C) Hexaamminetrichloridocobalt (III)
(D) None of these
The main element present in Vitamin $B_{12}$ is: [BSEB, 2024 A]
(A) Cobalt
(B) Magnesium
(C) Iron
(D) Nickel
Bihar Board Class 12th के (Chemistry/रसायन विज्ञानं ) = रसायन विज्ञानं ‘भाग-1 (Englsih Medium) Book Chapter-9 Coordination Compounds के Exam 2027 MCQs Questions Answer Key
| Q. No. | Answer | Q. No. | Answer | Q. No. | Answer | Q. No. | Answer |
| 1 | (D) | 39 | (B) | 77 | (B) | 115 | (B) |
| 2 | (B) | 40 | (C) | 78 | (C) | 116 | (A) |
| 3 | (C) | 41 | (B) | 79 | (C) | 117 | (C) |
| 4 | (B) | 42 | (B) | 80 | (B) | 118 | (B) |
| 5 | (D) | 43 | (B) | 81 | (D) | 119 | (A) |
| 6 | (A) | 44 | (B) | 82 | (A) | 120 | (A) |
| 7 | (B) | 45 | (B) | 83 | (A) | 121 | (D) |
| 8 | (B) | 46 | (B) | 84 | (C) | 122 | (A) |
| 9 | (C) | 47 | (A) | 85 | (C) | 123 | (D) |
| 10 | (B) | 48 | (B) | 86 | (B) | 124 | (A) |
| 11 | (B) | 49 | (D) | 87 | (B) | 125 | (B) |
| 12 | (B) | 50 | (C) | 88 | (A) | 126 | (C) |
| 13 | (A) | 51 | (A) | 89 | (C) | 127 | (A) |
| 14 | (B) | 52 | (D) | 90 | (D) | 128 | (A) |
| 15 | (B) | 53 | (A) | 91 | (C) | 129 | (A) |
| 16 | (A) | 54 | (B) | 92 | (D) | 130 | (A) |
| 17 | (C) | 55 | (A) | 93 | (B) | 131 | (C) |
| 18 | (C) | 56 | (C) | 94 | (A) | 132 | (A) |
| 19 | (C) | 57 | (B) | 95 | (B) | 133 | (A) |
| 20 | (A) | 58 | (A) | 96 | (B) | 134 | (B) |
| 21 | (C) | 59 | (A) | 97 | (C) | 135 | (B) |
| 22 | (C) | 60 | (A) | 98 | (A) | 136 | (A) |
| 23 | (B) | 61 | (B) | 99 | (B) | 137 | (B) |
| 24 | (B) | 62 | (A) | 100 | (C) | 138 | (B) |
| 25 | (A) | 63 | (2) | 101 | (B) | 139 | (A) |
| 26 | (C) | 64 | (A) | 102 | (A) | 140 | (A) |
| 27 | (A) | 65 | (D) | 103 | (B) | 141 | (A) |
| 28 | (C) | 66 | (A) | 104 | (C) | 142 | (A) |
| 29 | (D) | 67 | (C) | 105 | (D) | 143 | (D) |
| 30 | (B) | 68 | (A) | 106 | (C) | 144 | (A) |
| 31 | (B) | 69 | (A) | 107 | (B) | 145 | (A) |
| 32 | (A) | 70 | (A) | 108 | (C) | 146 | (B) |
| 33 | (B) | 71 | (A) | 109 | (A) | 147 | (C) |
| 34 | (A) | 72 | (A) | 110 | (B) | 148 | (C) |
| 35 | (A) | 73 | (A) | 111 | (A) | 149 | (A) |
| 36 | (D) | 74 | (C) | 112 | (B) | 150 | (A) |
| 37 | (D) | 75 | (C) | 113 | (A) | ||
| 38 | (C) | 76 | (C) | 114 | (A) |
Study Raw Bihar News Social Media Links:
Study Raw: Education World of India आप सभी Students के सहूलियत के लिए Social Media पर भी सारे Students को Bihar के सारे News से Updated रखते है। आपलोग नीचे दिए किसी भी Social Media से जुर सकते हैं। Follow us with following link mentioned below.
Bihar मे 4-Year Graduation का पूरा Syllabus सभी University के लिए Download करे नीचे दिए Link से
| University Name | Syllabus |
|---|---|
| BRABU Universit BA BSc BCom Syllabus | Syllabus |
| LNMU Universit BA BSc BCom Syllabus | Syllabus |
| TMBU Universit BA BSc BCom Syllabus | Syllabus |
| VKSU Universit BA BSc BCom Syllabus | Syllabus |
| BNMU Universit BA BSc BCom Syllabus | Syllabus |
| Jai Prakash Universit BA BSc BCom Syllabus | Syllabus |
| Patliputra University BA BSc BCom Syllabus | Syllabus |
| Purnea University BA BSc BCom Syllabus | Syllabus |
| Magadh University BA BSc BCom Syllabus | Syllabus |
| Munger University BA BSc BCom Syllabus | Syllabus |
| Patna University BA BSc BCom Syllabus | Syllabus |
Leave a Reply