This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Chemistry (Part Ii) Chapter 9 Coordination Compounds – Quiz 9 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Chemistry (Part Ii) Chapter 9 Coordination Compounds Quiz 9 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. 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. 2. When water molecules are exchanged between coordination sphere and ionization sphere the resulting isomerism are called A) Hydrate isomerism. B) Ionization isomerism. C) Linkage isomerism. D) Coordination isomerism. Show Answer Correct Answer: A) Hydrate isomerism. 3. 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. 4. 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. 5. 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. 6. 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. 7. What is the coordination number of the complex [Fe(CN)6]3-? A) 4. B) 6. C) 8. D) 2. Show Answer Correct Answer: B) 6. 8. Formula of hexaaquochromium(III) chloride A) [Cr(H2O)6]Cl2. B) [Cr(H2O)6]Cl3. C) [Cr(H2O)6]Cl. D) [Cr(H2O)6]Cl4. Show Answer Correct Answer: B) [Cr(H2O)6]Cl3. 9. 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. 10. The Complex [Mn(CN)6]4-has ..... hybridization A) Dsp2. B) Sp3d2. C) D2Sp3. D) Sp3. Show Answer Correct Answer: C) D2Sp3. 11. The IUPAC name of the compound [Cu (NH$_{3}$)$_{4}$](NO$_{3}$)$_{2}$ is: A) Cuprammonium nitrate. B) Tetraammine copper (II) dinitrate. C) Tetraammine copper (II) nitrate. D) Tetraammine copper (III) dinitrate. Show Answer Correct Answer: C) Tetraammine copper (II) nitrate. 12. The IUPAC name of the complex [Co (NH$_{3}$)$_{4}$ Cl$_{2}$] Cl is A) Dichloro tetraammine cobalt (III) chloride. B) Tetraammine dichloro cobalt (III) chloride. C) Tetraammine dichloro cobalt (II) chloride. D) Tetraammine dichloro cobalt (IV) chloride. Show Answer Correct Answer: B) Tetraammine dichloro cobalt (III) chloride. 13. How many coordination sites does a hexadentate ligand occupy? A) 6. B) 4. C) 2. D) 8. Show Answer Correct Answer: A) 6. 14. What is the reason that metals in coordination compounds love to accept a pair of electrons? A) They have a positive charge. B) They have a negative charge. C) They complete their octet rule. D) They have a full shell. Show Answer Correct Answer: C) They complete their octet rule. 15. 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 increases. B) It remains unchanged. C) It is not directly available. D) It becomes zero. Show Answer Correct Answer: C) It is not directly available. 16. Which of the following compounds shows optical isomerism? A) [Cu(NH3)4]2+. B) [ZnCl4]2-. C) [Cr(C2O4)3]3-. D) [Co(CN)6]3-. Show Answer Correct Answer: C) [Cr(C2O4)3]3-. 17. 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. 18. 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. 19. 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. 20. The hybridization in [NiCl4]2-has A) Dsp2. B) Sp3. C) Sp2. D) Sp3d. Show Answer Correct Answer: B) Sp3. 21. In the complex [SbF$_{5}$]$^{2-}$, sp$^{3}$d hybridisation is present. Geometry of the complex is A) Square pyramidal. B) Square bipyramidal. C) Tetrahedral. D) Square planar. Show Answer Correct Answer: A) Square pyramidal. 22. Coordination number of Ni in [Ni(C$_{2}$O$_{4}$)$_{3}$]$^{-4 }$is A) 3. B) 4. C) 6. D) 5. Show Answer Correct Answer: C) 6. 23. 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. 24. 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) 9. B) 6. C) 7. D) 8. Show Answer Correct Answer: A) 9. 25. The extraction of metals from ores often involves: A) Coordination compounds. B) Organic solvents. C) Acids only. D) Bases only. Show Answer Correct Answer: A) Coordination compounds. ← 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 8Class 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