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 8 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Chemistry (Part Ii) Chapter 9 Coordination Compounds Quiz 8 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. How do ligands affect the color of coordination compounds? A) Ligands affect the color of coordination compounds by altering the d-orbital splitting, which changes the wavelengths of light absorbed. B) Ligands affect the color by altering the atomic mass of the metal. C) Ligands only change the size of the coordination complex. D) Ligands have no effect on the color of coordination compounds. Show Answer Correct Answer: A) Ligands affect the color of coordination compounds by altering the d-orbital splitting, which changes the wavelengths of light absorbed. 2. What is the primary characteristic of a bidentate ligand in coordination compounds? A) It can only bond to one metal ion. B) It is always a negatively charged ion. C) It can form two bonds with a single metal ion. D) It can only bond with organic compounds. Show Answer Correct Answer: C) It can form two bonds with a single metal ion. 3. What primarily determines the shape (geometry) of a coordination compound? A) The number of electrons in the central metal. B) The coordination number. C) The type of atoms in the ligands. D) The overall charge of the compound. Show Answer Correct Answer: B) The coordination number. 4. EDTA is a ..... ligand A) Bidentate. B) Hexadentate. C) Monodentate. D) Tetradentate. Show Answer Correct Answer: B) Hexadentate. 5. The strong field ligand is A) I$^{-}$. B) NO$_{2}$$^{-}$. C) S$^{2-}$. D) SCN$^{-}$. Show Answer Correct Answer: B) NO$_{2}$$^{-}$. 6. How many ions are produced from the complex Co(NH3)6Cl2 in the solution? A) 4. B) 2. C) 3. D) 6. Show Answer Correct Answer: C) 3. 7. Co-ordination compounds have great importance in biological systems. In this context, which statement is incorrect? A) Carboxypeptidase A is an enzyme and contains zinc. B) Haemoglobin is the red pigment of blood and contains iron. C) Cyanocobalmin is B-12 and contains cobalt. D) Chlorophylls are green pigments in plants and contain calcium. Show Answer Correct Answer: D) Chlorophylls are green pigments in plants and contain calcium. 8. In the coordination compound 'Tetraammineplatinum(II) Tetrachloroplatinate(II)', what is the oxidation state of platinum? A) 3. B) 1. C) 4. D) 2. Show Answer Correct Answer: D) 2. 9. What is the term for ligands that can bind through more than one donor atom? A) Polydentate. B) Bidentate. C) Ambidentate. D) Unidentate. Show Answer Correct Answer: A) Polydentate. 10. What type of hybridization is typically found in octahedral coordination complexes? A) Sp3. B) Sp. C) Sp2. D) D2sp3. Show Answer Correct Answer: D) D2sp3. 11. Which of the following options are correct for [Fe(CN)6 ]3-complex?(i) Possess d2sp3 hybridisation(ii) Possess sp3d2 hybridisation(iii) It is paramagnetic(iv) It is diamagnetic A) (i) and (iii). B) (ii) and (iii). C) (i) and (iv). D) (ii) and (iv). Show Answer Correct Answer: A) (i) and (iii). 12. The co-ordination number of cobalt in thecomplex [Co(en)2 Br2]Cl2 is A) 6. B) 4. C) 2. D) 5. Show Answer Correct Answer: A) 6. 13. According to the postulates of Werner for coordinationcompounds A) Secondary valency is ionizable. B) Primary valency is ionizable. C) Primary and secondary valencies are non-ionizable. D) Only primary valency is non-ionizable. Show Answer Correct Answer: B) Primary valency is ionizable. 14. What is the formula for potassium tetrahydroxidozincate(II)? A) [CoCl2(en)2]I2. B) [Co(NH3)4(H2O)Cl]Cl2. C) K3[Al(C2O4)3]. D) K2[Zn(OH)4]. Show Answer Correct Answer: D) K2[Zn(OH)4]. 15. What is the IUPAC name for [Co(NH3)5(CO3)]Cl? A) Diamminechloridonitrito-N-platinum(II). B) Dichloridobis(ethane-1, 2-diamine)cobalt(III) chloride. C) Pentaamminecarbonatocobalt(III) chloride. D) Potassium trioxalatochromate(III). Show Answer Correct Answer: C) Pentaamminecarbonatocobalt(III) chloride. 16. What is the name of the complex [Cr(NH3)3(H2O)3]Cl3? A) Triamminetriaquachromium(II) chloride. B) Triaquatriamminechromium(III) chloride. C) Triamminetritriaquachromium(III) chloride. D) Triaquatriamminechromium(II) chloride. Show Answer Correct Answer: C) Triamminetritriaquachromium(III) chloride. 17. The coordination entity of K$_{2}$[NiCl$_{4}$] A) NiCl$_{4}$. B) Ni$^{2+}$. C) K$_{2}$[NiCl$_{4}$. D) [NiCl$_{4}$]$^{2-}$. Show Answer Correct Answer: D) [NiCl$_{4}$]$^{2-}$. 18. Arrange the following in order of their stabilities.1 [Cu(NH3)4]+22 [Cu(en)2]+23 Cu(trien)]+2 A) 1, 3, 2. B) 1, 2, 3. C) 2, 3, 1. D) 3, 2, 1. Show Answer Correct Answer: D) 3, 2, 1. 19. [Pt(NH$_{3}$)$_{2}$Cl(NO$_{2}$)] is named A) Diamminechloridonitrito-O-platinum(II). B) Diamminechloridonitrito-N-platinate(II). C) Diaminechloridonitrito-N-platinum(II). D) Diamminechloridonitrito-N-platinum(II). Show Answer Correct Answer: D) Diamminechloridonitrito-N-platinum(II). 20. What is the IUPAC name for [Ag(NH3)2][Ag(CN)2]? A) Silver diamminedicyanide. B) Amminesilver(I) dicyanide. C) Dicyanidodiammineargentate(I). D) Diamminesilver(I) dicyanidoargentate(I). Show Answer Correct Answer: D) Diamminesilver(I) dicyanidoargentate(I). 21. What is the property of a coordination compound where the metal ion shows a normal valency of 4+? A) Oxidation state. B) Chelation. C) Isomerism. D) Coordination number. Show Answer Correct Answer: A) Oxidation state. 22. What is the charge on the complex ion in [Fe(H$_{2}$O)$_{6}$]$^{2+}$? A) +4. B) +1. C) +3. D) +2. Show Answer Correct Answer: D) +2. 23. EDTA is commonly used for: A) Generating electricity. B) Catalyzing polymerization. C) Softening water. D) Producing pigments. Show Answer Correct Answer: C) Softening water. 24. In the complex [E(en)2(C2O4)]NO2 (where (en) is ethylenediamine) ..... are the coordination number and the oxidation state of the element 'E' respectively. A) 6 and 2. B) 2 and 2. C) 4 and 3. D) 6 and 3. Show Answer Correct Answer: D) 6 and 3. 25. What is the oxidation state of iron in [Fe(C2O4)3]3-? A) +2. B) +1. C) 0. D) +3. Show Answer Correct Answer: D) +3. 26. What is the term for the number of ligands directly bonded to the central metal atom? A) Ligand count. B) Valency. C) Coordination number. D) Complexity. Show Answer Correct Answer: C) Coordination number. 27. Which one is an anionic complex? A) [Ni(CO)$_{4}$]. B) [Co(NH$_{3}$)$_{6}$]Cl$_{3}$. C) K[Ag(CN)$_{2}$]. D) [Ag(NH$_{3}$)$_{2}$]Cl. Show Answer Correct Answer: C) K[Ag(CN)$_{2}$]. 28. Which is inner orbital complex? A) [NiCl4]2-. B) [CoF6]3-. C) [Fe(CN)6]4-. D) [MnF6]3-. Show Answer Correct Answer: C) [Fe(CN)6]4-. 29. What is the role of charcoal in the preparation of Co(III) complexes? A) Acts as a reducing agent. B) No role. C) Acts as a solvent. D) Acts as a catalyst. Show Answer Correct Answer: D) Acts as a catalyst. 30. Do coordination compounds smell funny? A) Only metal coordination compounds have a distinct smell. B) Not necessarily; it depends on the specific compound. C) Coordination compounds always smell like rotten eggs. D) All coordination compounds have a strong odor. Show Answer Correct Answer: B) Not necessarily; it depends on the specific compound. 31. How many unpaired electrons are there in a strong field iron (II) octahedral complex? A) 0. B) 1. C) 4. D) 2. Show Answer Correct Answer: A) 0. 32. What color can coordination compounds be? A) Coordination compounds can be various colors, including blue, green, red, yellow, and purple. B) Gray. C) Black. D) White. Show Answer Correct Answer: A) Coordination compounds can be various colors, including blue, green, red, yellow, and purple. 33. Which type of isomerism occurs in octahedral coordination entities involving didentate ligands? A) Optical isomerism. B) Geometrical isomerism. C) Linkage isomerism. D) Structural isomerism. Show Answer Correct Answer: A) Optical isomerism. 34. What is the absorption frequency for free CO32-? A) 850 cm-1. B) 830 cm-1. C) 700 cm-1. D) 890 cm-1. Show Answer Correct Answer: D) 890 cm-1. 35. The bridging molecule among the following is A) [Mn$_{2}$(CO)$_{10}$]. B) [Cr(CO)6]. C) [Fe(CO)5]. D) [Co$_{2}$(CO)$_{8}$]. Show Answer Correct Answer: D) [Co$_{2}$(CO)$_{8}$]. 36. Assertion:[Sc(H$_{2}$O)$_{6}$]$^{3+}$ is colorless.Reason:Sc has 3d$^{1}$ 4s$^{2}$ configuration. A) Both assertion and reason are correct statements, and reason is the correct explanation of the assertion. B) Both assertion and reason are correct statements, but reason is not the correct explanation of the assertion. C) Assertion is correct, but reason is a wrong statement. D) Assertion is wrong, but reason is correct statement. Show Answer Correct Answer: B) Both assertion and reason are correct statements, but reason is not the correct explanation of the assertion. 37. Which of the following coordination compounds will form a precipitate when treated with an aqueous solution of AgNO$_{3}$? A) Na$_{3}$[CrCl$_{6}$]. B) Na$_{3}$[Cr(CN)$_{6}$]. C) [Cr(NH$_{3}$)$_{6}$]Cl$_{3}$. D) [Cr(NH$_{3}$)Cl]NO$_{3}$. E) [Cr(NH$_{3}$)$_{3}$Cl$_{3}$]. Show Answer Correct Answer: C) [Cr(NH$_{3}$)$_{6}$]Cl$_{3}$. 38. What is the coordination number of a metal atom in a coordination compound? A) The number of ligands attached to the metal atom. B) The total number of electrons in the metal atom. C) The number of counter ions present. D) The charge of the metal atom. Show Answer Correct Answer: A) The number of ligands attached to the metal atom. 39. Name a common complex that contains a transition metal and a halide ligand. A) AgI. B) [CuCl4]2-. C) FeBr3. D) NiF2. Show Answer Correct Answer: B) [CuCl4]2-. 40. Which of the transition metals is the best conductor of heat and electric current? A) Gold. B) Silver. C) Tungsten. D) Titanium. E) Copper. Show Answer Correct Answer: B) Silver. 41. What is the role of the counter ion in a coordination compound? A) To stabilize the compound. B) To increase the coordination number. C) To balance the charge of the coordination sphere. D) To act as a ligand. Show Answer Correct Answer: C) To balance the charge of the coordination sphere. 42. What is the main difference between solvate isomers in coordination compounds? A) The type of metal ion used. B) Whether or not a solvent molecule is directly bonded to the metal ion or present as free solvent molecules in the crystal lattice. C) The oxidation state of the metal ion. D) The number of ligands attached to the metal ion. Show Answer Correct Answer: B) Whether or not a solvent molecule is directly bonded to the metal ion or present as free solvent molecules in the crystal lattice. 43. What is the role of transition metals in coordination chemistry? A) Transition metals are central to coordination chemistry due to their ability to form complexes with ligands. B) Transition metals only form ionic bonds and do not create complexes. C) Ligands are the primary focus in coordination chemistry, not transition metals. D) Transition metals are not involved in coordination chemistry. Show Answer Correct Answer: A) Transition metals are central to coordination chemistry due to their ability to form complexes with ligands. 44. Which complex is diamagnetic? A) [CoF6]3-. B) [Ni(CO)4]. C) [Fe(H2O)6]3+. D) [Cu(H2O)6]2+. Show Answer Correct Answer: B) [Ni(CO)4]. 45. Which of the following is the correct formula for tetracarbonylnickel(0)? A) Ni(CO)4. B) K2[Zn(OH)4]. C) [Co(NH3)4(H2O)Cl]Cl2. D) [CoCl2(en)2]I2. Show Answer Correct Answer: A) Ni(CO)4. 46. According to Werner's theory, what is the primary valence of CoCl3? A) 4. B) 2. C) 3. D) 1. Show Answer Correct Answer: C) 3. 47. What is the main postulate of Werner's theory regarding primary valencies? A) They are non-ionisable. B) They are satisfied by neutral molecules. C) They are satisfied by negative ions. D) They are equal to the coordination number. Show Answer Correct Answer: C) They are satisfied by negative ions. 48. What is the term for isomerism that arises from the interchange of ligands between cationic and anionic entities of different metal ions present in a complex? A) Coordination isomerism. B) Ionisation isomerism. C) Solvate isomerism. D) Linkage isomerism. Show Answer Correct Answer: A) Coordination isomerism. 49. The correct formula of Potassium diaquatetrachlorochromate (III) is A) K[CrCl$_{2}$(H$_{2}$O)$_{ 4}$]. B) K$_{2}$[CrCl$_{2}$(H$_{2}$O)$_{4}$]. C) K[CrCl$_{4}$(H$_{2}$O)$_{2}$]. D) K$_{2}$[CrCl$_{4}$(H$_{2}$O)$_{2}$]. Show Answer Correct Answer: C) K[CrCl$_{4}$(H$_{2}$O)$_{2}$]. 50. What is the correct way to indicate the charge of a coordination entity when written without the counter ion? A) As a prefix before the formula. B) Outside the square brackets as a right superscript. C) As a subscript after the formula. D) Inside the square brackets. Show Answer Correct Answer: B) Outside the square brackets as a right superscript. 51. The spatial arrangement of ligands around the central metal ion is known as A) Coordination sphere. B) Coordination number. C) Coordination polyhedron. D) Oxidation number. Show Answer Correct Answer: C) Coordination polyhedron. 52. When mole of CoCl$_{3}$.6NH$_{3}$ is treated with 2 mole of AgNO$_{3}$ solution. The number of moles of AgCl precipitated is/ are A) 0. B) 2. C) 3. D) 1. Show Answer Correct Answer: C) 3. 53. 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 lower energy A) Dz$^{2}$ and dx$^{2}$-y$^{2}$. B) Dxy$_{, }$ dxz and dyz. C) D$_{z}$$^{2}$. D) Dxy$_{ }$and dxz. Show Answer Correct Answer: A) Dz$^{2}$ and dx$^{2}$-y$^{2}$. 54. Why is nomenclature important in Coordination Chemistry? A) It helps in identifying the color of compounds. B) It provides a method for describing formulas and writing systematic names, especially for isomers. C) It determines the oxidation number of the central atom. D) It helps in predicting the shape of coordination polyhedra. Show Answer Correct Answer: B) It provides a method for describing formulas and writing systematic names, especially for isomers. 55. The number of unidentate ligands in the complex ion is called A) Coordination number. B) EAN. C) Primary valency. D) Oxidation number. Show Answer Correct Answer: A) Coordination number. 56. Which formula is correct for this complex ion:Sodium hexacyanoferrate(III) A) Na2[Fe(CN6)$_{6}$]. B) Na$_{4}$[Fe(CN)$_{6}$]. C) Na$_{4}$[Fe(CN)$_{5}$]. D) $_{S4}$[Fe(CN)$_{6}$]. Show Answer Correct Answer: B) Na$_{4}$[Fe(CN)$_{6}$]. 57. How does oxide acidity change with oxidation state? A) It increases. B) It decreases. C) It remains the same. D) None of the above. Show Answer Correct Answer: A) It increases. 58. Identify the ions in [Cu(NH3)4]SO4 A) Copper ion, ammonium ion, sulphate ions. B) Copper ion and sulphate ions. C) Only sulphate ions. D) None of the above. Show Answer Correct Answer: D) None of the above. 59. What is the charge of the complex ion [CuCl4]2-? A) -1. B) -2. C) +2. D) 0. Show Answer Correct Answer: B) -2. 60. Magnetic moment of [Cu(NH $_{3}$ )$_{4}$ ]$^{2+ }$ion is A) 1.73. B) 2.38. C) 2.23. D) 1.414. Show Answer Correct Answer: A) 1.73. ← 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 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 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books