This quiz works best with JavaScript enabled. Home > Class 12 > 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 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. How does the electronegativity of elements change as you move down a group? A) It remains constant. B) It decreases. C) It increases. D) None of the above. Show Answer Correct Answer: B) It decreases. 2. When writing the formula of a mononuclear coordination entity, how are the ligands listed? A) By their charge. B) By their size. C) In alphabetical order. D) By their color. Show Answer Correct Answer: C) In alphabetical order. 3. What are the factors affecting the stability of coordination complexes? A) Concentration of reactants involved. B) Factors affecting the stability of coordination complexes include metal ion nature, ligand type, complex geometry, metal oxidation state, and steric/electronic effects. C) Solvent polarity and viscosity. D) Temperature and pressure conditions. Show Answer Correct Answer: B) Factors affecting the stability of coordination complexes include metal ion nature, ligand type, complex geometry, metal oxidation state, and steric/electronic effects. 4. What is the significance of the ligand field theory in understanding coordination compounds? A) Ligand field theory is significant for understanding the electronic structure, stability, and properties of coordination compounds. B) It focuses solely on the geometric arrangement of ligands. C) It is used to predict the solubility of coordination compounds. D) It explains the color of coordination compounds only. Show Answer Correct Answer: A) Ligand field theory is significant for understanding the electronic structure, stability, and properties of coordination compounds. 5. Which of the following complex is stabilized by chelation? A) [Fe(CN)$_{6}$]$^{3-}$. B) [Fe(C$_{2}$O$_{4}$)$_{3}$]$^{3-}$. C) [Fe(H$_{2}$O)$_{6}$]$^{3+}$. D) [Fe(CO)$_{5}$]. Show Answer Correct Answer: B) [Fe(C$_{2}$O$_{4}$)$_{3}$]$^{3-}$. 6. What is a coordination compound? A) A coordination compound is a simple molecule with no metal ions. B) A coordination compound is a type of salt that does not contain ligands. C) A coordination compound is formed only by organic compounds without metals. D) A coordination compound is a complex formed by a central metal atom or ion bonded to ligands. Show Answer Correct Answer: D) A coordination compound is a complex formed by a central metal atom or ion bonded to ligands. 7. How do you name a complex ion with a neutral ligand? A) Combine the metal and ligand names into one word. B) Name the metal ion followed by the neutral ligand. C) Use the ligand name first, then the oxidation state of the metal. D) Name the neutral ligand followed by the metal ion. Show Answer Correct Answer: B) Name the metal ion followed by the neutral ligand. 8. What are the geometries of [NiCl4]2-and [Ni(CN)4]2-respectively, based on their hybridizations? A) Octahedral and Tetrahedral. B) Tetrahedral and Square Planar. C) Square Planar and Tetrahedral. D) Trigonal Bipyramidal and Octahedral. Show Answer Correct Answer: B) Tetrahedral and Square Planar. 9. In the complex [Co(NH3)6]Cl3, the coordination number of Co is: A) 3. B) 4. C) 5. D) 6. Show Answer Correct Answer: A) 3. 10. What is the role of ligands in the naming of coordination compounds? A) Ligands determine the prefixes for quantity and the order in naming coordination compounds. B) Ligands only affect the color of coordination compounds. C) Ligands are irrelevant in the naming process of coordination compounds. D) Ligands determine the chemical stability but not the naming order. Show Answer Correct Answer: A) Ligands determine the prefixes for quantity and the order in naming coordination compounds. 11. If magnetic moment of [MnBr4]2-is 5.9 BM. Predict thenumber of unpaired electrons? A) 2. B) 3. C) 5. D) 6. Show Answer Correct Answer: C) 5. 12. What is the electronic configuration of the Fe2+ ion? A) [Ar] 3d6 4s2. B) [Ar] 3d6 4s0. C) [Ar] 3d8 4s0. D) [Ar] 3d5 4s1. Show Answer Correct Answer: B) [Ar] 3d6 4s0. 13. Identify the type of ligand in [Ni(CO)4]. A) CO is a weak field ligand. B) CO is a bridging ligand. C) CO acts as a bidentate ligand. D) CO is a strong field ligand. Show Answer Correct Answer: D) CO is a strong field ligand. 14. Which named complex contains iridium bound to carbonyl and triphenylphosphine ligands? A) Vaska's complex. B) Reinecke's salt. C) Zeise's salt. D) Edmann's salt. Show Answer Correct Answer: A) Vaska's complex. 15. Which of the following is the correct formula for tetraammineaquachloridocobalt(III) chloride? A) [Co(NH3)4(H2O)Cl]Cl2. B) K2[Zn(OH)4]. C) K3[Al(C2O4)3]. D) [CoCl2(en)2]I2. Show Answer Correct Answer: A) [Co(NH3)4(H2O)Cl]Cl2. 16. What is the geometry of a coordination compound with the coordination number 6? A) Trigonal bipyramidal. B) Octahedral. C) Square planar. D) Tetrahedral. Show Answer Correct Answer: B) Octahedral. 17. What is the effect of ligand strength on the stability of coordination complexes? A) All ligands provide the same stability. B) Ligand strength has no effect on stability. C) Stronger ligands lead to more stable complexes. D) Stronger ligands lead to less stable complexes. Show Answer Correct Answer: C) Stronger ligands lead to more stable complexes. 18. Which of the following statements is true about primary valences in coordination compounds according to Werner's theory? A) They are non-ionisable and satisfied by neutral molecules. B) They are ionisable and satisfied by negative ions. C) They are equal to the coordination number. D) They are always satisfied by water molecules. Show Answer Correct Answer: B) They are ionisable and satisfied by negative ions. 19. What is the typical pH for the formation of a neutral complex from [Cu(H2O)6]2+? A) PH 4. B) PH 5. C) PH 6. D) PH 7. Show Answer Correct Answer: C) PH 6. 20. What is the oxidation state of the metal in [Cu(NH3)4]2+? A) +2. B) 0. C) +3. D) +1. Show Answer Correct Answer: A) +2. 21. What is the role of oxidation-reduction reactions in the behavior of coordination compounds? A) Oxidation-reduction reactions are irrelevant to coordination chemistry. B) They have no role in the behavior of coordination compounds. C) Oxidation-reduction reactions can change the oxidation state of the central metal, affecting stability and reactivity. D) They only affect the color of coordination compounds. Show Answer Correct Answer: C) Oxidation-reduction reactions can change the oxidation state of the central metal, affecting stability and reactivity. 22. The didentate ligand present in the complex [Co(OH)Cl(en)$_{2}$]Br is A) OH. B) Cl. C) En. D) Br. Show Answer Correct Answer: C) En. 23. Which type of isomerism arises in heteroleptic complexes due to different possible geometric arrangements of the ligands? A) Structural isomerism. B) Linkage isomerism. C) Coordination isomerism. D) Stereoisomerism. Show Answer Correct Answer: D) Stereoisomerism. 24. Which one is a cationic complex? A) K$_{3}$[Fe(CN)$_{6}$]. B) Na$_{2}$[Ni(EDTA)]. C) [Co(en)$_{2}$Cl$_{2}$]Cl. D) K$_{3}$[Fe(CN)$_{5}$NO]. Show Answer Correct Answer: C) [Co(en)$_{2}$Cl$_{2}$]Cl. 25. Which of the following is an example of linkage isomerism? A) [Cr(H2O)6]Cl3. B) [Co(NH3)6] [Cr(CN)6]. C) [Co(NH3)(NO2)]Cl2. D) [Co(NH3)5SO4]Br. Show Answer Correct Answer: C) [Co(NH3)(NO2)]Cl2. ← 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 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 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