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 3 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Chemistry (Part Ii) Chapter 9 Coordination Compounds Quiz 3 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The IUPAC name of K2 [Ni (CN)4] is A) Potassium tetracyanonickel (III). B) Potassium tetracyanonickelate (III). C) Potassium tetracyanatonickelate (II). D) Potassium tetracyanatonickel (II). Show Answer Correct Answer: C) Potassium tetracyanatonickelate (II). 2. Explain the significance of oxidation state in naming complexes. A) The oxidation state is significant in naming complexes as it indicates the charge of the metal, differentiating between complexes with similar ligands. B) Oxidation state only affects the color of the complex. C) The oxidation state is only important for organic compounds. D) The oxidation state is irrelevant in naming complexes. Show Answer Correct Answer: A) The oxidation state is significant in naming complexes as it indicates the charge of the metal, differentiating between complexes with similar ligands. 3. Among the following ions which one has the highest paramagnetism? A) [Zn(H$_{2}$O)$_{6}$]$^{+2}$. B) [Cu(H$_{2}$O)$_{6}$]$^{+2}$. C) [Fe(H$_{2}$O)$_{6}$]$^{+2}$. D) [Cr(H$_{2}$O)$_{6}$]$^{+3}$. Show Answer Correct Answer: C) [Fe(H$_{2}$O)$_{6}$]$^{+2}$. 4. Provide the molecular formula for the complex [Fe(CN)6]3-. A) FeC6N5. B) FeC4N6. C) FeC6N6. D) FeC5N6. Show Answer Correct Answer: C) FeC6N6. 5. Explain the concept of ligand field stabilization energy (LFSE). A) LFSE is the energy released when ligands bind to a metal center. B) LFSE refers to the total energy of a complex without considering ligand effects. C) LFSE is the energy associated with the movement of electrons in the d-orbitals. D) LFSE is the energy difference due to d-orbital splitting in a ligand field. Show Answer Correct Answer: D) LFSE is the energy difference due to d-orbital splitting in a ligand field. 6. Which statement about transition metals is TRUE? A) Their d-orbitals are completely filled. B) They cannot form colored compounds. C) They have only one stable oxidation state. D) They exhibit variable oxidation states. Show Answer Correct Answer: D) They exhibit variable oxidation states. 7. Octahedral has coordination number A) 6. B) 4. C) 3. D) 5. Show Answer Correct Answer: A) 6. 8. When a coordination complex is an anion, what suffix is added to the name of the central metal atom? A) -ite. B) -ate. C) -ous. D) -ide. Show Answer Correct Answer: B) -ate. 9. [Cr(NH$_{3}$)$_{6}$ ][Co(CN)$_{6}$] is an example of A) Ionisation Isomerism. B) Solvate Isomerism. C) Linkage Isomerism. D) Coordination Isomerism. Show Answer Correct Answer: D) Coordination Isomerism. 10. Which of the following complexes can exhibit optical isomerism? (en = H$_{2}$N-CH$_{2}$-CH$_{2}$-NH$_{2}$ and is bidentate) A) Cis-Co(NH$_{3}$)$_{4}$Cl$_{2}$. B) Trans-Co(en)$_{2}$Br$_{2}$. C) Cis-Co(en)$_{2}$Cl$_{2}$. D) Co(NH$_{3}$)$_{3}$Cl$_{3}$. E) None of these. Show Answer Correct Answer: C) Cis-Co(en)$_{2}$Cl$_{2}$. 11. Define bidentate and chelating ligands with examples. A) Bidentate ligands:Ethylenediamine (en); Chelating ligands:EDTA (Ethylenediaminetetraacetic acid). B) Monodentate ligands:Water (H2O). C) Polydentate ligands:Acetylacetonate (acac). D) Chelating ligands:Ammonia (NH3). Show Answer Correct Answer: A) Bidentate ligands:Ethylenediamine (en); Chelating ligands:EDTA (Ethylenediaminetetraacetic acid). 12. 1-chlorobutane reacts with alcoholic KOH to form A) 2-butanol. B) 1-butanol. C) 2-butene. D) 1-butene. Show Answer Correct Answer: D) 1-butene. 13. How is the oxidation number of the central atom in a complex defined? A) As the number of ligands attached to the central atom. B) As the charge it would carry if all the ligands were removed along with the electron pairs shared with the central atom. C) As the total number of atoms in the coordination sphere. D) As the type of donor groups attached to the metal. Show Answer Correct Answer: B) As the charge it would carry if all the ligands were removed along with the electron pairs shared with the central atom. 14. Which compound is formed by the reaction between potassium hexacyanocobaltate(III) and nickel(II) sulfate? A) Nickel(II) tetraammine dichlorido cobalt(III) ion. B) Potassium trioxalatoaluminate(III). C) Nickel(II) tetrahydroxozincate(II). D) Potassium tetrahydroxozincate(II). Show Answer Correct Answer: A) Nickel(II) tetraammine dichlorido cobalt(III) ion. 15. Which of the metal ions in the following complex ions has a d$^{5}$ electron configuration? A) Fe(CN)$_{6}$$^{3-}$. B) Mo(NH$_{3}$)$_{6}$$^{3+}$. C) V(H$_{2}$O)$_{6}$$^{2+}$. D) Co(CN)$_{4}$$^{-}$. E) RhCl$_{6}$$^{4-}$. Show Answer Correct Answer: A) Fe(CN)$_{6}$$^{3-}$. 16. Hemoglobin is a coordination compound containing which metal ion? A) Co. B) Cu. C) Zn. D) Fe. Show Answer Correct Answer: D) Fe. 17. What is the charge of ethylenediamine? A) 1. B) 0. C) 2. D) None of the above. Show Answer Correct Answer: B) 0. 18. What is the oxidation number of cobalt in [Co(NH3)6]3+? A) +4. B) +3. C) 0. D) +2. Show Answer Correct Answer: B) +3. 19. Cisplatin, a coordination compound, is widely used as a: A) Anticancer drug. B) Fertilizer. C) Fuel additive. D) Food preservative. Show Answer Correct Answer: A) Anticancer drug. 20. Select the correct IUPAC name for:[FeF$_{4}$(OH$_{2}$)$_{2}$]$^{-}$ A) Diaquatetrafluoroferrate(I) ion. B) Diaquatetrafluoroferrate(III) ion. C) Diaquatetrafluoroiron(III) ion. D) Diaquatetrafluoroiron(I) ion. Show Answer Correct Answer: B) Diaquatetrafluoroferrate(III) ion. 21. What is the name given to a coordination compound in which the ligands are different from each other? A) Chelate compound. B) Heteroleptic compound. C) Homoleptic compound. D) Isomeric compound. Show Answer Correct Answer: D) Isomeric compound. 22. Which theory, along with VBT, is used to explain the electronic structure of coordination compounds? A) CFT (Crystal Field Theory). B) VSEPR Theory. C) Hybridization Theory. D) Band Theory. Show Answer Correct Answer: A) CFT (Crystal Field Theory). 23. Which of the following complexes exhibits optical isomerism? A) [Cr(C2O4)3]3-. B) [NiCl4]2-. C) [Cu(NH3)4]2+. D) [Co(NH3)3Cl3]. Show Answer Correct Answer: A) [Cr(C2O4)3]3-. 24. What is the main difference between a double salt and a complex? A) Double salts dissociate into simple ions in water, while complexes do not. B) Complexes dissociate into simple ions in water, while double salts do not. C) Double salts are formed from only one compound, while complexes are formed from two. D) Double salts are always organic, while complexes are inorganic. Show Answer Correct Answer: A) Double salts dissociate into simple ions in water, while complexes do not. 25. According to Werner's theory, what are the two types of linkages shown by metals in coordination compounds? A) Primary and secondary. B) Ionic and covalent. C) Direct and indirect. D) Positive and negative. Show Answer Correct Answer: A) Primary and secondary. 26. Which hybridisation type is associated with a square planar distribution of hybrid orbitals in coordination compounds? A) Sp2d2. B) Dsp2. C) Sp3d. D) Sp3. Show Answer Correct Answer: B) Dsp2. 27. What is the coordination number of Co(en)$_{3}$$^{3+ }$ ..... A) 6. B) 3. C) 4. D) 3+. Show Answer Correct Answer: A) 6. 28. What is the coordination number and hybridisation type for an octahedral geometry in coordination compounds? A) 4, sp3. B) 4, dsp2. C) 5, sp3d. D) 6, sp3d2 or d2sp3. Show Answer Correct Answer: D) 6, sp3d2 or d2sp3. 29. Which type of isomerism is observed in a coordination compound with cis and trans geometric isomers? A) Geometrical isomerism. B) Optical isomerism. C) Coordination isomerism. D) Structural isomerism. Show Answer Correct Answer: A) Geometrical isomerism. 30. Which type of complex is formed when inner d-orbitals are utilized for hybridization, resulting in all electrons being paired? A) Paramagnetic complex. B) High spin complex. C) Inner orbital complex. D) Outer orbital complex. Show Answer Correct Answer: C) Inner orbital complex. 31. The energy diagram of the d orbital energy splitting complexes in octahedral geometry, shows the d orbitals with higher in energy (e$_{g}$) which refer to ..... d orbitals A) Dz$^{2}$. B) Dxy$_{, }$ dxz and dyz. C) Dz$^{2}$ and dx$^{2}$-y$^{2}$. D) Dxy$_{ }$and dxz. Show Answer Correct Answer: C) Dz$^{2}$ and dx$^{2}$-y$^{2}$. 32. The geometry and magnetic behaviour of the complex Ni(CO)$_{4}$ is A) Square planar and Paramagnetic. B) Tetrahedral and diamagnetic. C) Square planar and diamagnetic. D) Tetrahedral and paramagnetic. Show Answer Correct Answer: B) Tetrahedral and diamagnetic. 33. What is a characteristic property of transition metals? A) Occurrence of multiple oxidation states. B) Single oxidation state. C) No oxidation states. D) None of the above. Show Answer Correct Answer: A) Occurrence of multiple oxidation states. 34. Which of the following is a homoleptic complex? A) [Co(NH3)4Cl2]+. B) [Co(NH3)4(NO2)2]. C) [CoCl2(NH3)4]. D) [Co(NH3)6]3+. Show Answer Correct Answer: D) [Co(NH3)6]3+. 35. In tetrahedral complexes, which orbitals are hybridised to form four equivalent orbitals? A) One s and three p orbitals. B) Two s and two p orbitals. C) Three d and one s orbital. D) Four d orbitals. Show Answer Correct Answer: A) One s and three p orbitals. 36. What is the coordination number of a metal atom in a square planar complex? A) 4. B) 7. C) 5. D) 6. Show Answer Correct Answer: A) 4. 37. Which type of isomerism arises when didentate ligands are present in complexes of formula [MX2 (L-L)2]? A) Optical isomerism. B) Geometrical isomerism. C) Structural isomerism. D) Linkage isomerism. Show Answer Correct Answer: B) Geometrical isomerism. 38. Which ligand causes pairing? A) Weak field. B) Anionic. C) Strong field. D) Neutral. Show Answer Correct Answer: C) Strong field. 39. Which of the following species is not expected to be a ligand A) NH$_{4}$$^{+}$. B) NH$_{2}$CH$_{2}$CH$_{2}$NH$_{2}$. C) NO. D) CO. Show Answer Correct Answer: A) NH$_{4}$$^{+}$. 40. Werner theory explains? A) Bond length. B) Magnetism. C) Conductivity. D) Isomerism. Show Answer Correct Answer: D) Isomerism. 41. What is the IUPAC name for the ligand NH2? A) Amine. B) Amino. C) Nitrogen. D) Amide. Show Answer Correct Answer: B) Amino. 42. The donor sites of (EDTA)$^{4-}$ are? A) O atoms only. B) N atoms only. C) Two N and four O atoms. D) Three N and three O atoms. Show Answer Correct Answer: C) Two N and four O atoms. 43. Coodination number of [Cr(en)3]Cl3 is A) 3. B) 4. C) 6. D) A3 and 6. Show Answer Correct Answer: C) 6. 44. What is the hybridization of the central metal ion in [FeCl6]4-? A) Sp3d2. B) Sp3. C) Dsp2. D) D2sp3. Show Answer Correct Answer: A) Sp3d2. 45. Name a common monodentate ligand. A) Water (H2O). B) Ammonia (NH3). C) Chloride (Cl-). D) Carbon monoxide (CO). Show Answer Correct Answer: A) Water (H2O). 46. Total number of possible isomers in [CoCl$_{2}$ (en)$_{2}$ ]Cl is A) 3. B) 6. C) 2. D) 4. Show Answer Correct Answer: C) 2. 47. What is the purpose of microanalysis in characterization techniques? A) Determine the melting point. B) Determine the percentages of elements. C) Analyze infrared spectrum. D) Measure conductivity. Show Answer Correct Answer: B) Determine the percentages of elements. 48. What is the primary reason for the color of coordination compounds? A) Presence of unpaired electrons. B) Ligand field splitting. C) Metal ion concentration. D) Temperature of the solution. Show Answer Correct Answer: B) Ligand field splitting. 49. Prefixes such as mono, di, tri, etc., are used in naming coordination compounds to indicate what? A) The charge of the compound. B) The number of individual ligands. C) The type of central atom. D) The oxidation state of the metal. Show Answer Correct Answer: B) The number of individual ligands. 50. What is the correct name for [Cr(NH3)6]3+? A) Hexaamine chromium trication. B) Hexaamminechromium(III) ion. C) Chromium(III) ammine complex cation. D) Chromium hexaammine three plus. Show Answer Correct Answer: B) Hexaamminechromium(III) ion. 51. How do coordination compounds play a role in catalysis? A) Coordination compounds enhance reaction rates and selectivity in catalysis. B) Coordination compounds slow down reaction rates in catalysis. C) Coordination compounds only stabilize reactants without enhancing catalysis. D) Coordination compounds have no effect on catalysis processes. Show Answer Correct Answer: A) Coordination compounds enhance reaction rates and selectivity in catalysis. 52. Identify simple salt A) FeCl3. B) Ca(HCO3)2. C) NaKSO4. D) Na2ZnO2. Show Answer Correct Answer: A) FeCl3. 53. What do we call the center of a coordination compound? A) Complex ion. B) Central metal ion. C) Solvent. D) Ligand. Show Answer Correct Answer: B) Central metal ion. 54. What is the shape of Fe(CO)$_{5}$ A) Linear. B) Tetrahedral. C) Square planar. D) Trigonal bipyramidal. Show Answer Correct Answer: D) Trigonal bipyramidal. 55. The oxidation state of Fe in [Fe(CN)6]3-is: A) +4. B) +3. C) 0. D) +2. Show Answer Correct Answer: B) +3. 56. What industrial processes utilize coordination compounds and why? A) Coordination compounds are primarily used in textile manufacturing. B) Coordination compounds are essential for water purification. C) Coordination compounds are used in food preservation. D) Coordination compounds are used in catalysis, metal extraction, and as pigments. Show Answer Correct Answer: D) Coordination compounds are used in catalysis, metal extraction, and as pigments. 57. Which one of the following complexes is an outer orbitalcomplex? A) [Ni(NH3)6]2+. B) [Mn(CN)6]4-. C) [Co(NH3)6]3+. D) [Fe(CN)6]4-. Show Answer Correct Answer: A) [Ni(NH3)6]2+. 58. What is a complex ion? Give an example. A) [Ni(H2O)6]2+. B) [AgCl2]-. C) [Fe(CN)6]3-. D) [Cu(NH3)4]2+. Show Answer Correct Answer: D) [Cu(NH3)4]2+. 59. The magnetic properties of coordination compounds are influenced by: A) The nature of ligands. B) The oxidation state of the metal. C) The geometry of the complex. D) All of the above. Show Answer Correct Answer: D) All of the above. 60. What is the coordination sphere in a coordination compound? A) The central atom/ion and the ligands attached to it, enclosed in square brackets. B) The spatial arrangement of ligands around the central atom/ion. C) The oxidation state of the central atom/ion. D) The type of donor groups attached to the metal. Show Answer Correct Answer: A) The central atom/ion and the ligands attached to it, enclosed in square brackets. ← 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 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 8Class 12 Chemistry (Part Ii) Chapter 9 Coordination Compounds Quiz 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books