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 2 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Chemistry (Part Ii) Chapter 9 Coordination Compounds Quiz 2 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Magnetic moment depends on? A) Charge. B) Ligand. C) Unpaired electrons. D) Size. Show Answer Correct Answer: C) Unpaired electrons. 2. Complexes with dsp2 hybridization has A) Square planar geometry. B) Tetrahedral geometry. C) Octahedral geometry. D) Trigonal planar geometry. Show Answer Correct Answer: A) Square planar geometry. 3. Which of the following is true about the naming of anionic ligands in coordination compounds? A) They end with-ide. B) They end with-ium. C) They end with-ate. D) They end with-o. Show Answer Correct Answer: D) They end with-o. 4. (Valance Bond Theory) Magnetic measurements indicate that [Co(OH$_{2}$)$_{6}$]$^{2+}$ has 3 unpaired electrons. Therefore, the hybridization of the metal's orbitals in [Co(OH$_{2}$)$_{6}$]$^{2+}$ is: A) Dsp$^{2}$. B) Sp$^{3}$. C) Sp$^{2}$d. D) Sp$^{3}$d$^{2}$. Show Answer Correct Answer: D) Sp$^{3}$d$^{2}$. 5. What is the significance of the spectrochemical series? A) It ranks ligands based on their size. B) It ranks ligands based on their charge. C) It ranks ligands based on their field strength. D) It ranks ligands based on their solubility. Show Answer Correct Answer: C) It ranks ligands based on their field strength. 6. Which geometrical shape is more common in coordination compounds of transition metals according to Werner? A) Tetrahedral. B) Square planar. C) Octahedral. D) Linear. Show Answer Correct Answer: C) Octahedral. 7. What is the IUPAC name for [Ni(H2O)6]Cl2? A) Dihydroxynickel(II) chloride. B) Hexahydronickel(II) chloride. C) Nickel(II) chloride. D) Hexaaquanickel(II) chloride. Show Answer Correct Answer: D) Hexaaquanickel(II) chloride. 8. Which complex is colourless? A) [Zn(NH3)4]2+. B) [Fe(H2O)6]3+. C) [CoCl4]2-. D) [Cu(H2O)6]2+. Show Answer Correct Answer: A) [Zn(NH3)4]2+. 9. What type of ligand is ethylenediamine (en)? A) Polydentate ligand. B) Bidentate ligand. C) Tridentate ligand. D) Monodentate ligand. Show Answer Correct Answer: B) Bidentate ligand. 10. What is the IUPAC name for the complex [Cu(NH3)4]SO4? A) Copper(II) ammine sulfate. B) Copper(II) sulfate. C) Tetraamminecopper(I) sulfate. D) Tetraamminecopper(II) sulfate. Show Answer Correct Answer: D) Tetraamminecopper(II) sulfate. 11. What is a common application of coordination compounds in everyday life? A) They are primarily used in the production of plastics. B) They are used as flavor enhancers in food. C) They are used in the manufacturing of glass. D) They are used as catalysts in chemical reactions. Show Answer Correct Answer: D) They are used as catalysts in chemical reactions. 12. The stability of a complex increases with: A) Greater charge on the central metal. B) Larger ionic radius of the metal. C) Weak-field ligands. D) Fewer donor atoms. Show Answer Correct Answer: A) Greater charge on the central metal. 13. Which compound is formed by the reaction between sodium tetrahydroxozincate(II) and cobalt(III) chloride? A) Nickel(II) tetraammine dichlorido cobalt(III) ion. B) Sodium tetraammine cobalt(III) ion. C) Sodium tetrahydroxozincate(II). D) Cobalt(III) trioxalatoaluminate(III). Show Answer Correct Answer: B) Sodium tetraammine cobalt(III) ion. 14. The IUPAC name for [Pt(NH$_{3}$)$_{3}$(Br)(NO$_{2}$)(Cl)]Cl is A) Triamminebromochloronitroplatinum(IV) chloride. B) Triaminenitrochlorobromoplatinum(IV) chloride. C) Triamminechloronitrobromoplatinum(IV) chloride. D) Triamminechlorobromonitroplatinum(IV) chloride. Show Answer Correct Answer: A) Triamminebromochloronitroplatinum(IV) chloride. 15. Strong field ligands such as CN$^{-}$: A) Usually produce high spin complexes and small crystal field splitting. B) Usually produce low spin complexes and small crystal field splitting. C) Usually produce low spin complexes and high crystal field splitting. D) Usually produce high spin complexes and high crystal field splitting. Show Answer Correct Answer: C) Usually produce low spin complexes and high crystal field splitting. 16. 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. 17. When writing the formula of a mononuclear coordination entity, how are the ligands listed? A) By their charge. B) By their color. C) In alphabetical order. D) By their size. Show Answer Correct Answer: C) In alphabetical order. 18. 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. 19. 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. 20. Which of the following complex is stabilized by chelation? A) [Fe(H$_{2}$O)$_{6}$]$^{3+}$. B) [Fe(CN)$_{6}$]$^{3-}$. C) [Fe(C$_{2}$O$_{4}$)$_{3}$]$^{3-}$. D) [Fe(CO)$_{5}$]. Show Answer Correct Answer: C) [Fe(C$_{2}$O$_{4}$)$_{3}$]$^{3-}$. 21. 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. 22. 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. 23. 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. 24. In the complex [Co(NH3)6]Cl3, the coordination number of Co is: A) 4. B) 5. C) 3. D) 6. Show Answer Correct Answer: C) 3. 25. 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. 26. 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. 27. What is the electronic configuration of the Fe2+ ion? A) [Ar] 3d6 4s0. B) [Ar] 3d5 4s1. C) [Ar] 3d6 4s2. D) [Ar] 3d8 4s0. Show Answer Correct Answer: A) [Ar] 3d6 4s0. 28. 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. 29. Which named complex contains iridium bound to carbonyl and triphenylphosphine ligands? A) Edmann's salt. B) Vaska's complex. C) Reinecke's salt. D) Zeise's salt. Show Answer Correct Answer: B) Vaska's complex. 30. Which of the following is the correct formula for tetraammineaquachloridocobalt(III) chloride? A) K3[Al(C2O4)3]. B) [CoCl2(en)2]I2. C) K2[Zn(OH)4]. D) [Co(NH3)4(H2O)Cl]Cl2. Show Answer Correct Answer: D) [Co(NH3)4(H2O)Cl]Cl2. 31. What is the geometry of a coordination compound with the coordination number 6? A) Square planar. B) Trigonal bipyramidal. C) Tetrahedral. D) Octahedral. Show Answer Correct Answer: D) Octahedral. 32. 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. 33. 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. 34. What is the typical pH for the formation of a neutral complex from [Cu(H2O)6]2+? A) PH 6. B) PH 7. C) PH 4. D) PH 5. Show Answer Correct Answer: A) PH 6. 35. What is the oxidation state of the metal in [Cu(NH3)4]2+? A) +2. B) +3. C) +1. D) 0. Show Answer Correct Answer: A) +2. 36. 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. 37. The didentate ligand present in the complex [Co(OH)Cl(en)$_{2}$]Br is A) En. B) Cl. C) Br. D) OH. Show Answer Correct Answer: A) En. 38. Which type of isomerism arises in heteroleptic complexes due to different possible geometric arrangements of the ligands? A) Linkage isomerism. B) Structural isomerism. C) Coordination isomerism. D) Stereoisomerism. Show Answer Correct Answer: D) Stereoisomerism. 39. Which one is a cationic complex? A) Na$_{2}$[Ni(EDTA)]. B) [Co(en)$_{2}$Cl$_{2}$]Cl. C) K$_{3}$[Fe(CN)$_{6}$]. D) K$_{3}$[Fe(CN)$_{5}$NO]. Show Answer Correct Answer: B) [Co(en)$_{2}$Cl$_{2}$]Cl. 40. Which of the following is an example of linkage isomerism? A) [Co(NH3)6] [Cr(CN)6]. B) [Co(NH3)5SO4]Br. C) [Co(NH3)(NO2)]Cl2. D) [Cr(H2O)6]Cl3. Show Answer Correct Answer: C) [Co(NH3)(NO2)]Cl2. 41. What type of isomerism occurs when ligands can bind through different atoms? A) Coordination isomerism. B) Linkage isomerism. C) Geometric isomerism. D) Optical isomerism. Show Answer Correct Answer: B) Linkage isomerism. 42. Which of the following is listed first when writing the formula of a mononuclear coordination entity? A) The ligand. B) The central atom. C) The charge. D) The counter ion. Show Answer Correct Answer: B) The central atom. 43. Which is a double salt? A) Carnallite. B) Potassium ferrocyanide. C) Potassium ferricyanide. D) Nessler's reagent. Show Answer Correct Answer: A) Carnallite. 44. Which type of isomerism arises due to different spatial arrangements of ligands? A) Linkage isomerism. B) Structural isomerism. C) Stereoisomerism. D) Ionization isomerism. Show Answer Correct Answer: C) Stereoisomerism. 45. According to Werner's theory, what was the basis for explaining the difference in properties of certain nitrogen-containing organic substances? A) Acidity. B) Solubility. C) Isomerism. D) Electronegativity. Show Answer Correct Answer: C) Isomerism. 46. What is the formula for dichloridobis(ethane-1, 2-diamine)cobalt(III) chloride? A) [CoCl2(en)2]Cl. B) K2[Zn(OH)4]. C) Ni(CO)4. D) [Co(NH3)4(H2O)Cl]Cl2. Show Answer Correct Answer: A) [CoCl2(en)2]Cl. 47. Who was the first Swiss chemist to win the Nobel Prize for work on the linkage of atoms and the coordination theory? A) Marie Curie. B) Robert Hooke. C) Linus Pauling. D) Alfred Werner. Show Answer Correct Answer: D) Alfred Werner. 48. Which theory explains the color of coordination compounds? A) EAN rule. B) Octet rule. C) VBT. D) CFT. Show Answer Correct Answer: D) CFT. 49. How do you name the complex [Ni(CO)4]? A) Nickelcarbonyl(I). B) Pentacarbonylnickel(I). C) Dicarbonylnickel(0). D) Tetracarbonylnickel(0). Show Answer Correct Answer: D) Tetracarbonylnickel(0). 50. Which rule is followed when naming coordination compounds? A) The ligand is named first in both positive and negative entities. B) The cation is named first in both positive and negative entities. C) The anion is always named first. D) The charge is named first. Show Answer Correct Answer: B) The cation is named first in both positive and negative entities. 51. What is the type of compound formed by coordinating molecules by sharing electrons? A) Coordination compound. B) Covalent compound. C) Metallic compound. D) Ionic compound. Show Answer Correct Answer: A) Coordination compound. 52. Which of the following ligands is considered a weak field ligand? A) Cyanide (CN-). B) Acetate (CH3COO-). C) Ammonia (NH3). D) Fluoride (F-). Show Answer Correct Answer: B) Acetate (CH3COO-). 53. The value of 'spin only' magnetic moment for one of the following configurations is 2.84 BM. The correct one is: A) D$^{4}$ (in strong field ligand in octahedral complexes). B) D$^{4}$ (in weak field ligand in octahedral complexes). C) D$^{3}$ (in weak as well as strong field ligand in octahedral complexes). D) D$^{5}$ (in strong field ligand in octahedral complexes). Show Answer Correct Answer: A) D$^{4}$ (in strong field ligand in octahedral complexes). 54. What is a ligand in coordination chemistry? A) A ligand is a catalyst that speeds up chemical reactions. B) A ligand is a molecule or ion that binds to a central metal atom in coordination chemistry. C) A ligand is a solvent used in coordination chemistry. D) A ligand is a type of metal atom in coordination chemistry. Show Answer Correct Answer: B) A ligand is a molecule or ion that binds to a central metal atom in coordination chemistry. 55. Which of the following complexes is a homoleptic complex? A) [Co(NH3)5Cl]Cl2. B) [Co(NH3)4Cl2]+. C) [Co(NH3)6]3+. D) [Co(NH3)4(NO2)2]. Show Answer Correct Answer: C) [Co(NH3)6]3+. 56. Identify homoleptic complex among the following. A) CoCl$_{3}$. B) [Co(NH$_{3}$)$_{6}$]$^{3+}$. C) [Co(NH$_{3}$)$_{3}$Cl$_{3}$]$^{3+}$. D) [Co(en)Cl$_{2}$]$_{2}$(SO$_{4}$)$_{3}$. Show Answer Correct Answer: B) [Co(NH$_{3}$)$_{6}$]$^{3+}$. 57. Which of the following is considered a ligand in a coordination compound? A) Ions or molecules bound to the central atom/ion. B) Only metal ions. C) Only water molecules. D) Only large molecules. Show Answer Correct Answer: A) Ions or molecules bound to the central atom/ion. 58. The sum of coordination number and oxidation number of the metal M in the complex [M(en)$_{2}$ C$_{2}$O$_{4}$] Cl are A) 8. B) 9. C) 7. D) 6. Show Answer Correct Answer: B) 9. 59. What happens to the coordination number in a dissociation reaction? A) Changes in oxidation state. B) Increases. C) Decreases. D) Unchanged. Show Answer Correct Answer: C) Decreases. 60. Dextro-rotatory and Laevo-rotatory are A) Enantiomers. B) Diastereomers. C) Cis/trans isomers. D) Fac/mer isomers. Show Answer Correct Answer: A) Enantiomers. ← 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 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 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books