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 4 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Chemistry (Part Ii) Chapter 9 Coordination Compounds Quiz 4 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which process is used to identify chloride ions that remain in solution after precipitation in Werner's experiments? A) Evaporating the solution. B) Adding hydrochloric acid. C) Heating the solution. D) Adding excess silver nitrate solution. Show Answer Correct Answer: D) Adding excess silver nitrate solution. 2. Ligand which has two different donor atoms and either of the two ligetes in the complex is called A) Polydentate ligand. B) Didentate ligand. C) Ambidentate ligand. D) Chelate ligand. Show Answer Correct Answer: C) Ambidentate ligand. 3. What is the term used for the atom/ion to which a fixed number of ions/groups are bound in a definite geometrical arrangement in a coordination entity? A) Ligand. B) Central atom/ion. C) Chelate. D) Ambidentate. Show Answer Correct Answer: B) Central atom/ion. 4. Explain the concept of ligand field theory and its importance in coordination chemistry. A) Ligand field theory only applies to ionic compounds. B) Ligand field theory explains the electronic structure and properties of transition metal complexes by analyzing the interaction between metal ions and ligands. C) Ligand field theory is irrelevant to the color of transition metal complexes. D) Ligand field theory describes the behavior of non-metal elements. Show Answer Correct Answer: B) Ligand field theory explains the electronic structure and properties of transition metal complexes by analyzing the interaction between metal ions and ligands. 5. How is the oxidation state of the metal indicated in the name of a coordination compound? A) By a prefix. B) By Roman numeral in parentheses. C) By a suffix. D) By a subscript. Show Answer Correct Answer: B) By Roman numeral in parentheses. 6. In Crystal Field Theory, why does the energy of d orbitals increase when ligands approach? A) To increase the coordination number. B) Due to attraction between ligands and orbitals. C) To stabilize the compound. D) Due to repulsion between ligands and orbitals. Show Answer Correct Answer: D) Due to repulsion between ligands and orbitals. 7. Which of the following is an example of a solvate isomer pair? A) [Cr(H2O)6]Cl3 and [Cr(H2O)6]Cl2.H2O. B) [Fe(CN)6]4-and [Fe(CN)6]3-. C) [Co(NH3)6]Cl3 and [Co(NH3)5Cl]Cl2. D) [Pt(NH3)2Cl2] and [Pt(NH3)4]Cl2. Show Answer Correct Answer: A) [Cr(H2O)6]Cl3 and [Cr(H2O)6]Cl2.H2O. 8. Which of the following is an example of an octahedral entity in coordination compounds? A) [Ni(CO)4]. B) [PtCl4]2-. C) [CoCl2(NH3)4]+. D) [Co(NH3)6]3+. Show Answer Correct Answer: D) [Co(NH3)6]3+. 9. What is the significance of the oxidation state of the central metal in coordination compounds? A) The oxidation state affects the bonding and stability of the coordination compound. B) The oxidation state only influences the solubility of the compound. C) The oxidation state determines the color of the coordination compound. D) The oxidation state has no effect on the properties of coordination compounds. Show Answer Correct Answer: A) The oxidation state affects the bonding and stability of the coordination compound. 10. Which one of the following has an optical isomer? (en = ethylenediamine) A) [Co(en)3]3+. B) [Zn(en)(NH3)2]2+. C) [Zn(en)2]2+. D) [Co(H2O)4(en)]3+. Show Answer Correct Answer: A) [Co(en)3]3+. 11. Which one of the following is a monodentate ligand? A) CN-. B) EDTA. C) H2NCH2CH2NH2. D) C2O4-. Show Answer Correct Answer: A) CN-. 12. The oxidation state of nickel in [Ni(CO)$_{4}$] is A) +1. B) +2. C) +3. D) None of these. Show Answer Correct Answer: D) None of these. 13. The definition of coordination number is ..... A) Number of electrons in the d orbital. B) The number of bonds the metal forms with ligands. C) The oxidation number of the metal. D) None of the above. Show Answer Correct Answer: B) The number of bonds the metal forms with ligands. 14. What is the charge on the complex ion [Fe(CN)6]3-? A) +3. B) 0. C) -3. D) +6. Show Answer Correct Answer: C) -3. 15. What is the oxidation state of iron (Fe) in both [FeCl6]4-and [Fe(CN)6]4-complexes? A) +2 in [FeCl6]4-and +3 in [Fe(CN)6]4-. B) +3 in [FeCl6]4-and +2 in [Fe(CN)6]4-. C) +2 in both complexes. D) +3 in both complexes. Show Answer Correct Answer: C) +2 in both complexes. 16. Which of the following is an example of a chelate ligand? A) EDTA4-. B) H2O. C) NH3. D) Cl-. Show Answer Correct Answer: A) EDTA4-. 17. EAN rule was proposed by ..... A) Jean Marie Lehn. B) Sidgwick. C) Alfred Werner. D) De Broglie. Show Answer Correct Answer: B) Sidgwick. 18. Which ligand is bidentate? A) NH3. B) En. C) Cl-. D) H2O. Show Answer Correct Answer: B) En. 19. What are the properties of strong field ligands? A) Strong field ligands have a high ligand field strength, cause large splitting of d-orbitals, promote low-spin configurations, and form strong bonds with metal ions. B) Strong field ligands promote high-spin configurations. C) Strong field ligands cause small splitting of d-orbitals. D) Strong field ligands have low ligand field strength. Show Answer Correct Answer: A) Strong field ligands have a high ligand field strength, cause large splitting of d-orbitals, promote low-spin configurations, and form strong bonds with metal ions. 20. In coordination compounds, the color is often due to: A) Electron transitions. B) Ligand size. C) Metal charge. D) Solvent effects. Show Answer Correct Answer: A) Electron transitions. 21. When water molecules are exchanged between coordination sphere and ionization sphere the resulting isomerism are called A) Linkage isomerism. B) Ionization isomerism. C) Hydrate isomerism. D) Coordination isomerism. Show Answer Correct Answer: C) Hydrate isomerism. 22. What are the species that can donate at least one lone pair of electrons called? A) Complexes. B) Cations. C) Ligands. D) Counterions. Show Answer Correct Answer: C) Ligands. 23. What is the coordination sphere in a complex? A) Only the central atom. B) The central atom and its ligands. C) The counter ions. D) Only the ligands. Show Answer Correct Answer: B) The central atom and its ligands. 24. What is a bridging ligand and how does it function in coordination compounds? A) A bridging ligand only connects to a single metal center. B) A bridging ligand is a non-coordinating molecule that stabilizes metal ions. C) A bridging ligand connects multiple metal centers in coordination compounds by coordinating through multiple donor atoms. D) A bridging ligand is a type of solvent used in reactions. Show Answer Correct Answer: C) A bridging ligand connects multiple metal centers in coordination compounds by coordinating through multiple donor atoms. 25. When the ligands move along the x, y and z axes of d orbital in metal ion (tetrahedral geometry), none of the five d orbitals is directly in their path. Name the d orbitals that feel strong repulsion? A) Dz$^{2}$ and dx$^{2}$-y$^{2}$. B) Dxy$_{, }$ dxz and dyz. C) Dz$^{2}$. D) Dxy$_{ }$and dxz. Show Answer Correct Answer: B) Dxy$_{, }$ dxz and dyz. 26. What is the coordination number of the complex [Fe(CN)6]3-? A) 2. B) 8. C) 4. D) 6. Show Answer Correct Answer: D) 6. 27. Formula of hexaaquochromium(III) chloride A) [Cr(H2O)6]Cl. B) [Cr(H2O)6]Cl4. C) [Cr(H2O)6]Cl3. D) [Cr(H2O)6]Cl2. Show Answer Correct Answer: C) [Cr(H2O)6]Cl3. 28. Ethylene diamine tetra acetic acid (EDTA) is a A) Monodentate ligand. B) Didentate ligand. C) Ambidentate ligand. D) Chelating ligand. Show Answer Correct Answer: D) Chelating ligand. 29. The Complex [Mn(CN)6]4-has ..... hybridization A) D2Sp3. B) Dsp2. C) Sp3d2. D) Sp3. Show Answer Correct Answer: A) D2Sp3. 30. The IUPAC name of the compound [Cu (NH$_{3}$)$_{4}$](NO$_{3}$)$_{2}$ is: A) Tetraammine copper (II) dinitrate. B) Tetraammine copper (III) dinitrate. C) Cuprammonium nitrate. D) Tetraammine copper (II) nitrate. Show Answer Correct Answer: D) Tetraammine copper (II) nitrate. 31. The IUPAC name of the complex [Co (NH$_{3}$)$_{4}$ Cl$_{2}$] Cl is A) Tetraammine dichloro cobalt (III) chloride. B) Tetraammine dichloro cobalt (II) chloride. C) Tetraammine dichloro cobalt (IV) chloride. D) Dichloro tetraammine cobalt (III) chloride. Show Answer Correct Answer: A) Tetraammine dichloro cobalt (III) chloride. 32. How many coordination sites does a hexadentate ligand occupy? A) 4. B) 8. C) 6. D) 2. Show Answer Correct Answer: C) 6. 33. What is the reason that metals in coordination compounds love to accept a pair of electrons? A) They have a negative charge. B) They have a positive charge. C) They complete their octet rule. D) They have a full shell. Show Answer Correct Answer: C) They complete their octet rule. 34. According to Hund's rule, when more than three 3d electrons are present, what happens to the availability of 3d orbitals for octahedral hybridisation? A) It is not directly available. B) It becomes zero. C) It remains unchanged. D) It increases. Show Answer Correct Answer: A) It is not directly available. 35. Which of the following compounds shows optical isomerism? A) [ZnCl4]2-. B) [Cr(C2O4)3]3-. C) [Co(CN)6]3-. D) [Cu(NH3)4]2+. Show Answer Correct Answer: B) [Cr(C2O4)3]3-. 36. Explain the significance of isomerism in coordination compounds. A) All coordination compounds are identical regardless of isomerism. B) Isomerism in coordination compounds is significant as it results in different properties and behaviors, impacting their applications in various fields. C) Isomerism has no effect on the properties of coordination compounds. D) Isomerism only affects the color of coordination compounds. Show Answer Correct Answer: B) Isomerism in coordination compounds is significant as it results in different properties and behaviors, impacting their applications in various fields. 37. Which of the following is a postulate of Werner's theory? A) All ligands are unidentate. B) Primary valences are satisfied by neutral molecules. C) Secondary valences are non-ionizable. D) All coordination compounds are soluble in water. Show Answer Correct Answer: C) Secondary valences are non-ionizable. 38. How does the presence of a negative ligand affect the overall charge of a complex? A) The presence of a negative ligand decreases the overall charge of the complex. B) Negative ligands only affect the geometry of the complex, not its charge. C) Negative ligands have no effect on the overall charge of the complex. D) The presence of a negative ligand increases the overall charge of the complex. Show Answer Correct Answer: A) The presence of a negative ligand decreases the overall charge of the complex. 39. The hybridization in [NiCl4]2-has A) Sp2. B) Sp3. C) Sp3d. D) Dsp2. Show Answer Correct Answer: B) Sp3. 40. In the complex [SbF$_{5}$]$^{2-}$, sp$^{3}$d hybridisation is present. Geometry of the complex is A) Square pyramidal. B) Tetrahedral. C) Square bipyramidal. D) Square planar. Show Answer Correct Answer: A) Square pyramidal. 41. Coordination number of Ni in [Ni(C$_{2}$O$_{4}$)$_{3}$]$^{-4 }$is A) 4. B) 5. C) 3. D) 6. Show Answer Correct Answer: D) 6. 42. How do you identify the common geometries of coordination compounds? A) Common geometries include linear, tetrahedral, square planar, and octahedral. B) Cubic. C) Hexagonal. D) Trigonal planar. Show Answer Correct Answer: A) Common geometries include linear, tetrahedral, square planar, and octahedral. 43. The sum of coordination number and oxidation number of the metal M in the complex [M(en)2(C2O4)]Cl (where (en) is ethylenediamine) is A) 6. B) 9. C) 8. D) 7. Show Answer Correct Answer: B) 9. 44. The extraction of metals from ores often involves: A) Bases only. B) Acids only. C) Organic solvents. D) Coordination compounds. Show Answer Correct Answer: D) Coordination compounds. 45. The coordination number of [Cu(en)$_{3}$]$^{2+}$ is A) 6. B) 2. C) 12. D) 3. Show Answer Correct Answer: A) 6. 46. Oxidation state of Co in [Co(NH3)5Cl]Cl2? A) +1. B) 0. C) +2. D) +3. Show Answer Correct Answer: D) +3. 47. Cl as ligand results in A) High spin complex. B) Low spin complex. C) Either high or low spin complex. D) None of the above. Show Answer Correct Answer: A) High spin complex. 48. What is meant by the term "complex ion" ? A) An anion. B) A cation. C) An ion with 4 electrons. D) A central metal ion surrounded by ligands. Show Answer Correct Answer: D) A central metal ion surrounded by ligands. 49. What is the significance of the coordination number in a coordination compound? A) It determines the geometry of the compound. B) It represents the charge of the central metal atom. C) It shows the number of unpaired electrons. D) It indicates the number of ligands attached to the metal atom. Show Answer Correct Answer: D) It indicates the number of ligands attached to the metal atom. 50. What is the electron configuration of the Sc(I) ion? A) [Ar] 3s$^{1}$3d$^{1}$. B) [Ar] 3d$^{2}$. C) [Ar] 4s$^{1}$4d$^{1}$. D) [Ar] 4s$^{1}$3d$^{1}$. E) [Ar] 4s$^{2}$. Show Answer Correct Answer: B) [Ar] 3d$^{2}$. 51. Which is used in cancer-chemotherapy? A) Cisplatin. B) Zeise's salt. C) Both (1) and (2). D) None of these. Show Answer Correct Answer: A) Cisplatin. 52. What is the term for mirror image optical isomers that cannot be superimposed on one another? A) Linkage isomers. B) Coordination isomers. C) Structural isomers. D) Enantiomers. Show Answer Correct Answer: D) Enantiomers. 53. In the complex [Fe(CN)$_{6}$]$^{4-}$, the ligand is ..... A) CN ion. B) Fe ion. C) No ligands. D) I don't know. Show Answer Correct Answer: A) CN ion. 54. What is the maximum oxidation state expected for vanadium? A) +5. B) +6. C) +4. D) +3. E) +8. Show Answer Correct Answer: A) +5. 55. Which ligand is represented by the symbol 'en' in coordination compounds? A) Ethanol. B) Ethyne. C) Ethylene. D) Ethane. Show Answer Correct Answer: D) Ethane. 56. Which is not an example of a ligand substitution reaction? A) [Cu(H$_{2}$O)$_{6}$]$^{2+}$ + 3en $\rightarrow$ [Cu(en)$_{3}$]$^{2+}$ + 6H$_{2}$O. B) [Cu(H$_{2}$O)$_{4}$(OH)$_{2}$] + 4NH$_{3 }$$\rightarrow$ [Cu(H$_{2}$O)$_{2}$(NH$_{3}$)$_{4}$]$^{2+}$ + 2H$_{2}$O + 2OH$^{-}$. C) [Cu(H$_{2}$O)$_{6}$]$^{2+}$ + 4Cl$^{-}$ $\rightarrow$ [Cu(Cl)$_{4}$]$^{2-}$ + 6H$_{2}$O. D) [Cu(H$_{2}$O)$_{6}$]$^{2+}$ + 2OH$^{-}$ $\rightarrow$ [Cu(H$_{2}$O)$_{4}$(OH)$_{2}$] + 2H$_{2}$O. Show Answer Correct Answer: D) [Cu(H$_{2}$O)$_{6}$]$^{2+}$ + 2OH$^{-}$ $\rightarrow$ [Cu(H$_{2}$O)$_{4}$(OH)$_{2}$] + 2H$_{2}$O. 57. What is the oxidation state of platinum in [PtCl6]2-? A) +3. B) +4. C) +2. D) +6. Show Answer Correct Answer: B) +4. 58. The metal carbonyl which is paramagnetic is A) Cr(CO)$_{6}$. B) Ni(CO)$_{4}$. C) Fe(CO)$_{5}$. D) V(CO)$_{6}$. Show Answer Correct Answer: D) V(CO)$_{6}$. 59. Which one is a neutral ligand? A) H$_{2}$O. B) NH$_{3}$. C) CO. D) All of these. Show Answer Correct Answer: D) All of these. 60. An example for a double salt is A) Potash Alum. B) Potassium ferricyanide. C) Cobalt hexamine bromide. D) Cupric sulphate. Show Answer Correct Answer: A) Potash Alum. ← 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 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 8Class 12 Chemistry (Part Ii) Chapter 9 Coordination Compounds Quiz 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books