This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Chemistry (Part Ii) Chapter 9 Coordination Compounds – Quiz 8 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Chemistry (Part Ii) Chapter 9 Coordination Compounds Quiz 8 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. 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. 2. Which one of the following complexes is an outer orbitalcomplex? A) [Co(NH3)6]3+. B) [Mn(CN)6]4-. C) [Fe(CN)6]4-. D) [Ni(NH3)6]2+. Show Answer Correct Answer: D) [Ni(NH3)6]2+. 3. What is a complex ion? Give an example. A) [Fe(CN)6]3-. B) [Cu(NH3)4]2+. C) [Ni(H2O)6]2+. D) [AgCl2]-. Show Answer Correct Answer: B) [Cu(NH3)4]2+. 4. 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. 5. 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. 6. Which process is used to identify chloride ions that remain in solution after precipitation in Werner's experiments? A) Adding excess silver nitrate solution. B) Heating the solution. C) Evaporating the solution. D) Adding hydrochloric acid. Show Answer Correct Answer: A) Adding excess silver nitrate solution. 7. 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. 8. 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. 9. 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. 10. How is the oxidation state of the metal indicated in the name of a coordination compound? A) By a prefix. B) By a suffix. C) By Roman numeral in parentheses. D) By a subscript. Show Answer Correct Answer: C) By Roman numeral in parentheses. 11. The value of the 'spin only' magnetic moment for one of the following configurations is 2.84 B.M. The correct one A) D$^{4}$ (in strong ligand field). B) D$^{2}$ (in weak ligand field). C) D$^{3}$ (in weak as well as in strong fields). D) D$^{5}$ (in strong ligand field). Show Answer Correct Answer: A) D$^{4}$ (in strong ligand field). 12. 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. 13. 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. 14. Which of the following is an example of an octahedral entity in coordination compounds? A) [Ni(CO)4]. B) [PtCl4]2-. C) [Co(NH3)6]3+. D) [CoCl2(NH3)4]+. Show Answer Correct Answer: C) [Co(NH3)6]3+. 15. 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. 16. Which one of the following has an optical isomer? (en = ethylenediamine) A) [Zn(en)(NH3)2]2+. B) [Co(en)3]3+. C) [Co(H2O)4(en)]3+. D) [Zn(en)2]2+. Show Answer Correct Answer: B) [Co(en)3]3+. 17. Which one of the following is a monodentate ligand? A) CN-. B) EDTA. C) C2O4-. D) H2NCH2CH2NH2. Show Answer Correct Answer: A) CN-. 18. 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. 19. 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. 20. What is the charge on the complex ion [Fe(CN)6]3-? A) +3. B) -3. C) +6. D) 0. Show Answer Correct Answer: B) -3. 21. 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. 22. Which of the following is an example of a chelate ligand? A) Cl-. B) NH3. C) EDTA4-. D) H2O. Show Answer Correct Answer: C) EDTA4-. 23. EAN rule was proposed by ..... A) Jean Marie Lehn. B) Alfred Werner. C) Sidgwick. D) De Broglie. Show Answer Correct Answer: C) Sidgwick. 24. Which ligand is bidentate? A) NH3. B) H2O. C) En. D) Cl-. Show Answer Correct Answer: C) En. 25. 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. ← PreviousNext →Related 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 9Class 12 Chemistry (Part Ii) Chapter 9 Coordination Compounds Quiz 10Class 12 Chemistry (Part Ii) Chapter 9 Coordination Compounds Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books