This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Chemistry (Part Ii) Chapter 9 Coordination Compounds – Quiz 20 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Chemistry (Part Ii) Chapter 9 Coordination Compounds Quiz 20 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What is the correct way to indicate the charge of a coordination entity when written without the counter ion? A) Inside the square brackets. B) As a prefix before the formula. C) Outside the square brackets as a right superscript. D) As a subscript after the formula. Show Answer Correct Answer: C) Outside the square brackets as a right superscript. 2. The spatial arrangement of ligands around the central metal ion is known as A) Coordination sphere. B) Coordination polyhedron. C) Oxidation number. D) Coordination number. Show Answer Correct Answer: B) Coordination polyhedron. 3. 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) 3. B) 0. C) 1. D) 2. Show Answer Correct Answer: A) 3. 4. 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$^{2}$. 5. 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. 6. The number of unidentate ligands in the complex ion is called A) EAN. B) Coordination number. C) Primary valency. D) Oxidation number. Show Answer Correct Answer: B) Coordination number. 7. Which formula is correct for this complex ion:Sodium hexacyanoferrate(III) A) Na$_{4}$[Fe(CN)$_{6}$]. B) $_{S4}$[Fe(CN)$_{6}$]. C) Na$_{4}$[Fe(CN)$_{5}$]. D) Na2[Fe(CN6)$_{6}$]. Show Answer Correct Answer: A) Na$_{4}$[Fe(CN)$_{6}$]. 8. 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. 9. 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. 10. What is the charge of the complex ion [CuCl4]2-? A) -2. B) -1. C) 0. D) +2. Show Answer Correct Answer: A) -2. 11. Magnetic moment of [Cu(NH $_{3}$ )$_{4}$ ]$^{2+ }$ion is A) 1.414. B) 1.73. C) 2.23. D) 2.38. Show Answer Correct Answer: B) 1.73. 12. The IUPAC name of the complex [Co (NH3)4 Cl2] 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. Which ligand is represented by the symbol 'CS' in coordination compounds? A) Cyanide. B) Carbonate. C) Chloride. D) Carbonyl. Show Answer Correct Answer: A) Cyanide. 14. Bidentate ligand is A) CN$^{-}$. B) Ethylene diammine (en). C) SCN$^{-}$. D) EDTA. Show Answer Correct Answer: B) Ethylene diammine (en). 15. What type of ligand is ethane-1, 2-diamine? A) Bidentate. B) Polydentate. C) Chelate. D) Unidentate. Show Answer Correct Answer: A) Bidentate. 16. Exchange of co-ordination group by a water molecule in complex molecule results in A) Ionisation isomerism. B) Ligand isomerism. C) Hydration isomerism. D) Geometrical isomerism. Show Answer Correct Answer: C) Hydration isomerism. 17. In a coordination compound, what is the role of a ligand? A) It is the central metal atom. B) It accepts electrons from the central metal. C) It donates electrons to the central metal. D) It forms an ionic bond with the central metal. Show Answer Correct Answer: C) It donates electrons to the central metal. 18. In K3[Co(NO3)6]-NO3 is a A) Neutral ligand. B) Negative ligand. C) Positive ligand. D) None of the above. Show Answer Correct Answer: B) Negative ligand. 19. What is the oxidation state of iron in the coordination compound 'Potassium Hexacyanoferrate(II)'? A) 1. B) 4. C) 3. D) 2. Show Answer Correct Answer: D) 2. 20. What is the IUPAC name for [CoCl2(en)2]? A) Bis(ethylenediamine) dichlorocobalt(II). B) Ethylenediamine dichlorocobalt(II). C) Dichloroethylenediamine cobalt(II). D) Bis(ethylenediamine) dichlorocobalt(III). Show Answer Correct Answer: D) Bis(ethylenediamine) dichlorocobalt(III). 21. Explain the concept of geometric isomerism in coordination complexes. A) Geometric isomerism only applies to organic compounds. B) Geometric isomerism in coordination complexes refers to the different spatial arrangements of ligands around a central metal atom, leading to distinct isomers. C) Geometric isomerism involves changes in the oxidation state of the metal. D) Geometric isomerism is the same as optical isomerism in coordination complexes. Show Answer Correct Answer: B) Geometric isomerism in coordination complexes refers to the different spatial arrangements of ligands around a central metal atom, leading to distinct isomers. 22. Assertion:In metal carbonyls, metals have 0 or low oxidation state.Reason:Carbon monoxide is a strong field ligand. 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. 23. Which of the following can function as a chelating agent? A) SH$^{-}$. B) H$_{2}$O. C) H$_{2}$NCH$_{2}$CO$_{ 2}$ $^{-}$. D) SCN. Show Answer Correct Answer: C) H$_{2}$NCH$_{2}$CO$_{ 2}$ $^{-}$. 24. The compound having lowest oxidation state of iron is A) K$_{4}$[Fe(CN)$_{6}$]. B) K$_{2}$FeO$_{4}$. C) [Fe(CO)$_{5}$]. D) K$_{3}$[Fe(CN)$_{6}$]. Show Answer Correct Answer: C) [Fe(CO)$_{5}$]. 25. The geometry of [Ni(CO)4] is: A) Square planar. B) Tetrahedral. C) Octahedral. D) Linear. Show Answer Correct Answer: B) Tetrahedral. ← 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 9Class 12 Chemistry (Part Ii) Chapter 9 Coordination Compounds Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books