This quiz works best with JavaScript enabled. Home > Cbse > Class 12 > Science > Chemistry Part Ii > Class 12 Chemistry (Part Ii) Chapter 9 Coordination Compounds – Quiz 10 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Chemistry (Part Ii) Chapter 9 Coordination Compounds Quiz 10 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which property of coordination compounds is influenced by the arrangement of ligands? A) Magnetic properties. B) Boiling point. C) Solubility. D) Molecular weight. Show Answer Correct Answer: A) Magnetic properties. 2. Alfred Werner in his theory of coordination compounds proposed that A) The secondary valences are ionisable. B) The secondary valences are satisfied by positive ions. C) The secondary valences are non ionisable. D) The secondary valence is not fixed for a metal. Show Answer Correct Answer: C) The secondary valences are non ionisable. 3. Which ligand is ambidentate? A) CN-. B) H2O. C) NO2-. D) NH3. Show Answer Correct Answer: C) NO2-. 4. What is the difference between a homoleptic and a heteroleptic complex? A) Homoleptic complexes are always larger than heteroleptic complexes. B) Homoleptic complexes contain no ligands; heteroleptic complexes contain one type of ligand. C) Homoleptic complexes can have multiple types of ligands; heteroleptic complexes cannot. D) Homoleptic complexes have one type of ligand; heteroleptic complexes have multiple types of ligands. Show Answer Correct Answer: D) Homoleptic complexes have one type of ligand; heteroleptic complexes have multiple types of ligands. 5. EAN (Effective Atomic Number) of a metal carbonyl M(CO)$_{x}$ is 36. If atomic number of metal M is 26, what is the value of x? A) 5. B) 8. C) 4. D) 6. Show Answer Correct Answer: A) 5. 6. Which statement is true about naming ionic compounds containing complex ions? A) You never have to indicate the number of cations and anions in the name. B) You must always indicate the number of cations and anions in the name. C) Only the number of cations is indicated. D) Only the number of anions is indicated. Show Answer Correct Answer: A) You never have to indicate the number of cations and anions in the name. 7. Coordination isomerism arises from the interchange of ligands between which entities? A) Only cationic entities. B) Only anionic entities. C) Cationic and anionic entities of different metal ions. D) Neutral entities. Show Answer Correct Answer: C) Cationic and anionic entities of different metal ions. 8. In optical isomerism, what is the difference between dextrorotatory (d) and laevorotatory (l) forms? A) D rotates the plane of polarized light to the left, l to the right. B) D is always achiral, l is always chiral. C) D rotates the plane of polarized light to the right, l to the left. D) D absorbs light, l emits light. Show Answer Correct Answer: C) D rotates the plane of polarized light to the right, l to the left. 9. What is the oxidation number of the central metal atom in the coordination compound[Pt(NH$_{3}$)$_{3}$Cl]Cl? A) 0. B) -1. C) +2. D) +1. Show Answer Correct Answer: C) +2. 10. Which of the following is a structural isomerism type in coordination compounds? A) Geometric isomerism. B) Linkage isomerism. C) Optical isomerism. D) Coordination isomerism. Show Answer Correct Answer: D) Coordination isomerism. 11. How can the stability of a coordination compound be affected? A) By increasing the size of the metal ion. B) By changing the temperature of the solution. C) By altering the oxidation state of the central metal ion. D) By using only organic ligands. Show Answer Correct Answer: C) By altering the oxidation state of the central metal ion. 12. The number of geometrical isomers expected for octahedral complex [Mabcdef] is A) 30. B) 15. C) 5. D) 2. Show Answer Correct Answer: B) 15. 13. Which of the following complexes is expected to be paramagnetic? A) [CoCl4]2-. B) [Cu(NH3)4]2+. C) [Ni(CO)4]. D) [Fe(H2O)6]3+. Show Answer Correct Answer: D) [Fe(H2O)6]3+. 14. Vitamin B12 is a coordination compound of A) Nickel. B) Cobalt. C) Iron. D) Magnesium. Show Answer Correct Answer: B) Cobalt. 15. Which of the following is a coordination compound? A) NaCl. B) NH4Cl. C) H2O. D) K4[Fe(CN)6]. Show Answer Correct Answer: D) K4[Fe(CN)6]. 16. Which of the following is NOT mentioned as a coordination compound in biological systems? A) Haemoglobin. B) Vitamin B12. C) Chlorophyll. D) Glucose. Show Answer Correct Answer: D) Glucose. 17. What is the molecular formula for the complex [Cr(H2O)6]Cl3? A) CrH10Cl3O6. B) CrH12Cl3O6. C) CrH12Cl4O6. D) CrH12Cl2O5. Show Answer Correct Answer: B) CrH12Cl3O6. 18. The oxidation number of cobalt in K[Co(CO)$_{4}$] is A) -3. B) +1. C) +3. D) -1. Show Answer Correct Answer: D) -1. 19. What are some applications of coordination compounds in medicine? A) Applications of coordination compounds in medicine include drug delivery systems, imaging agents, and therapeutic agents for cancer and anemia. B) They serve as catalysts in industrial processes. C) Coordination compounds are used for food preservation. D) Coordination compounds are primarily used in agriculture. Show Answer Correct Answer: A) Applications of coordination compounds in medicine include drug delivery systems, imaging agents, and therapeutic agents for cancer and anemia. 20. Which of the following complex is diamagnetic in nature A) [Nicl4]2-. B) [ NiCN4]2-. C) [CoF6]3-. D) [NiCO4]. Show Answer Correct Answer: B) [ NiCN4]2-. 21. What is the coordination number of a complex with a tetrahedral geometry? A) 6. B) 4. C) 8. D) 2. Show Answer Correct Answer: B) 4. 22. How do you determine the coordination number of a complex? A) The coordination number is the total number of protons in the central metal ion. B) The coordination number is the total number of ligand atoms bonded to the central metal ion. C) The coordination number is the number of electrons in the outer shell of the metal ion. D) The coordination number is determined by the size of the ligands used in the complex. Show Answer Correct Answer: B) The coordination number is the total number of ligand atoms bonded to the central metal ion. 23. What is the IUPAC name for [Cu(NH3)4]SO4? A) Tetraamminecopper(II) sulfate. B) Copper(II) sulfate tetraamine. C) Copper(II) ammonium sulfate. D) Tetraaminecopper(I) sulfate. Show Answer Correct Answer: A) Tetraamminecopper(II) sulfate. 24. High spin complexes having coordination number ' 6 ' are usually formed through A) Sp$^{3}$d hybridisation. B) D$^{2}$sp$^{3}$ hybridisation. C) Sp$^{3}$ hybridisation. D) Sp$^{3}$d$^{2}$ hybridisation. Show Answer Correct Answer: D) Sp$^{3}$d$^{2}$ hybridisation. 25. In [NiCl$_{4}$]$^{2-}$, what is the geometry of the complex? A) Square planar. B) Linear. C) Tetrahedral. D) Octahedral. Show Answer Correct Answer: C) Tetrahedral. 26. How do you predict the color of a coordination compound? A) The color is determined solely by the temperature of the solution. B) The color of a coordination compound is predicted based on the metal, ligands, and their interactions, particularly d-orbital splitting. C) The color is based on the size of the metal ion only. D) The color is influenced by the pH of the solution without regard to ligands. Show Answer Correct Answer: B) The color of a coordination compound is predicted based on the metal, ligands, and their interactions, particularly d-orbital splitting. 27. Which of the following best defines a coordination entity? A) A central metal atom or ion bonded to a fixed number of ions or molecules. B) A molecule with only covalent bonds. C) An atom with no surrounding ligands. D) A compound with only ionic bonds. Show Answer Correct Answer: A) A central metal atom or ion bonded to a fixed number of ions or molecules. 28. Consider the following complexes:I. Pt(NH$_{3}$)$_{2}$Cl$_{2-}$square planarII. Rh(en)$_{3}$$^{2+ }$III$^{. }$CoCl$_{4}$$^{2-}$-(Tetrahedral)Which can exhibit cis-trans isomerism? A) I. B) II. C) III. D) I, II. E) I, II and III. Show Answer Correct Answer: A) I. 29. In a coordination entity of the type [PtCl2(en)2]2+, which isomer shows optical activity? A) Cis-isomer. B) Facial isomer. C) Trans-isomer. D) Meridional isomer. Show Answer Correct Answer: A) Cis-isomer. 30. What are complexes that undergo substitution reaction at room temperature called? A) Kinetically labile. B) Kinetically inert. C) Stable. D) Unstable. Show Answer Correct Answer: A) Kinetically labile. 31. Which of the following best defines a coordination compound? A) A compound formed by covalent bonds only. B) A compound consisting of only nonmetals. C) A compound in which a central metal atom or ion is bonded to surrounding molecules or ions by coordinate bonds. D) A compound containing ionic bonds only. Show Answer Correct Answer: C) A compound in which a central metal atom or ion is bonded to surrounding molecules or ions by coordinate bonds. 32. Inner orbital complexes having ..... Hybridization. A) Dsp2. B) Sp3d2. C) Sp3. D) D2Sp3. Show Answer Correct Answer: D) D2Sp3. 33. The correct formula of tetraaquadichlorochromium (III) chloride is A) [CrCl$_{2}$(H$_{2}$O)$_{4}$]Cl$_{3}$. B) [CrCl$_{2}$(H$_{2}$O)$_{6}$]Cl. C) [CrCl$_{2}$(H$_{2}$O)$_{4}$]Cl. D) [CrCl$_{2}$(H$_{2}$O)$_{4}$]Cl$_{2}$. Show Answer Correct Answer: C) [CrCl$_{2}$(H$_{2}$O)$_{4}$]Cl. 34. Which is square planar? A) D5. B) D8 (strong field). C) D10. D) D3. Show Answer Correct Answer: B) D8 (strong field). 35. The secondary valency of the complex, K2[HgI4]-which is known Nessler's reagent is A) 6. B) 7. C) 2. D) 4. Show Answer Correct Answer: D) 4. 36. Which term describes the spatial arrangement of ligand atoms around a central atom? A) Coordination sphere. B) Coordination number. C) Coordination polyhedron. D) Ligand field. Show Answer Correct Answer: C) Coordination polyhedron. 37. Identify the lewis acid in the coordination entitiy. [CoCl(NH3)5]2+. A) NH3. B) Cl-. C) Co3+. D) All the above. Show Answer Correct Answer: C) Co3+. 38. A complex compound in which the oxidation number of a metal is zero is A) [Pl (NH3 )4]Cl2. B) K4 [Fe (CN)6]. C) [Ni (CO)4]. D) K3 [Fe (CN)6]. Show Answer Correct Answer: C) [Ni (CO)4]. 39. What is the effect of a strong ligand on the electrons of the central metal atom? A) The electrons get paired. B) The electrons get stabilized. C) The electrons get ionized. D) The electrons get unpaired. Show Answer Correct Answer: A) The electrons get paired. 40. What are isomers? A) Compounds with the same chemical formula and same arrangement of atoms. B) Compounds with the same chemical formula but different arrangement of atoms. C) Compounds with different chemical formula and same arrangement of atoms. D) Compounds with different chemical formula and different arrangement of atoms. Show Answer Correct Answer: B) Compounds with the same chemical formula but different arrangement of atoms. 41. Which of the following complexes is a heteroleptic complex? A) [CuCl2(NH3)2]. B) [Co(NH3)6]3+. C) [Ni(CO)4]. D) [Co(NH3)4Cl2]+. Show Answer Correct Answer: D) [Co(NH3)4Cl2]+. 42. The charge of the sulfate ion is ..... A) 2-. B) 1+. C) 1-. D) 2+. Show Answer Correct Answer: A) 2-. 43. How does the geometry of a coordination compound affect its properties? A) All coordination compounds have the same geometry. B) Geometry only affects the color of the compound. C) The geometry has no effect on the properties. D) Different geometries can influence reactivity and stability. Show Answer Correct Answer: D) Different geometries can influence reactivity and stability. 44. The ionisation isomer of [Cr(H2O)4Cl(NO2)C] is A) [Cr(H2O)4Cl(ONO)Cl. B) [Cr(H2O)4Cl2(NO2)] H2O. C) [Cr(H2O)4Cl2](NO2). D) [Cr(H2O)4(O2N)]Cl2. Show Answer Correct Answer: C) [Cr(H2O)4Cl2](NO2). 45. Who was the first to formulate the theory of coordination compounds? A) Marie Curie. B) Linus Pauling. C) Dmitri Mendeleev. D) Alfred Werner. Show Answer Correct Answer: D) Alfred Werner. 46. The coordination number and the oxidation state of the element 'Co' in the complex [Co(en)$_{2}$Cl$_{2}$]$^{+}$(where (en) is ethylene diamine) are, respectively- A) 6 and +2. B) 4 and +2. C) 4 and +3. D) 6 and +3. Show Answer Correct Answer: D) 6 and +3. 47. The number of ions formed on dissolving one molecule of FeSO4(NH4)2SO4.6H2O in water is A) 5. B) 3. C) 4. D) 6. Show Answer Correct Answer: D) 6. 48. What are the main types of ligands in coordination chemistry? A) Simple, complex, and hybrid ligands. B) Hexadentate, octadentate, and tetradentate ligands. C) Monodentate, bidentate, and polydentate ligands. D) Cationic, anionic, and neutral ligands. Show Answer Correct Answer: C) Monodentate, bidentate, and polydentate ligands. 49. The isomers have different atom to atom bonding are called A) Optical isomers. B) Structural isomers. C) Stereoisomers. D) Geometrical isomers. Show Answer Correct Answer: B) Structural isomers. 50. What is the term for a ligand that has two different donor atoms and can bind through either of them? A) Hexadentate. B) Monodentate. C) Chelate. D) Ambidentate. Show Answer Correct Answer: D) Ambidentate. 51. Which of the following compounds can exhibit cis-trans isomerism? A) [Ni(CO)2(NH3)2] 2+. B) [Fe(CO)5NO2] 2+. C) [MnClBr3] 2-. D) [Cu(CO)5Cl]+. Show Answer Correct Answer: A) [Ni(CO)2(NH3)2] 2+. 52. Which of the following is NOT a common neutral ligand in coordination compounds? A) Carbonal. B) Aqua. C) Ammonia. D) Nitronium. Show Answer Correct Answer: D) Nitronium. 53. What is the importance of isomerism in coordination compounds? A) Isomerism only affects the color of coordination compounds. B) Isomerism has no effect on the stability of coordination compounds. C) Isomerism is irrelevant to the biological activity of coordination compounds. D) Isomerism is important in coordination compounds as it influences their properties and reactivity. Show Answer Correct Answer: D) Isomerism is important in coordination compounds as it influences their properties and reactivity. 54. The coordination number in a coordination compound refers to: A) The number of donor atoms surrounding the central metal atom in a complex ion. B) The number of electrons in the atom. C) The number of donor atoms donated to the ligands. D) The number of metals present in the complex ion. Show Answer Correct Answer: A) The number of donor atoms surrounding the central metal atom in a complex ion. 55. Which one of the following complexes can exhibit geometrical isomerism? A) [Co(NH3)5Cl]2+(octahedral). B) [Zn(NH3)2Cl2] (tetrahedral). C) [Pt(NH3)2Cl2] (square planar). D) [Cu(NH3)4]2+(square planar). Show Answer Correct Answer: C) [Pt(NH3)2Cl2] (square planar). 56. Which type of valency corresponds to the oxidation number of the metal? A) Secondary valency. B) Tertiary valency. C) Quaternary valency. D) Primary valency. Show Answer Correct Answer: D) Primary valency. 57. Which type of isomerism is NOT possible for a tetrahedral geometry in coordination compounds? A) Ionisation isomerism. B) Optical isomerism. C) Geometric isomerism. D) Linkage isomerism. Show Answer Correct Answer: C) Geometric isomerism. 58. Name two types of ligands based on their donor atoms. A) Polydentate and Unidentate ligands. B) Monodentate and Bidentate ligands. C) Tridentate and Quadridentate ligands. D) Hexadentate and Octadentate ligands. Show Answer Correct Answer: B) Monodentate and Bidentate ligands. 59. Which causes maximum CFSE? A) D10. B) D5. C) High spin. D) Low spin. Show Answer Correct Answer: D) Low spin. 60. What will be shape of a K[CrF4] complex? A) Square planar. B) Tetrahedral. C) Square pyramidal. D) Octahedral. Show Answer Correct Answer: B) Tetrahedral. ← PreviousNext →Related QuizzesScience QuizzesClass 12 QuizzesClass 12 Chemistry (Part Ii) Chapter 9 Coordination Compounds Quiz 1Class 12 Chemistry (Part Ii) Chapter 9 Coordination Compounds Quiz 2Class 12 Chemistry (Part Ii) Chapter 9 Coordination Compounds Quiz 3Class 12 Chemistry (Part Ii) Chapter 9 Coordination Compounds Quiz 4Class 12 Chemistry (Part Ii) Chapter 9 Coordination Compounds Quiz 5Class 12 Chemistry (Part Ii) Chapter 9 Coordination Compounds Quiz 6Class 12 Chemistry (Part Ii) Chapter 9 Coordination Compounds Quiz 7Class 12 Chemistry (Part Ii) Chapter 9 Coordination Compounds Quiz 8 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books