This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Chemistry (Part Ii) Chapter 9 Coordination Compounds – Quiz 24 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Chemistry (Part Ii) Chapter 9 Coordination Compounds Quiz 24 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Consider the following complexes:I. Pt(NH$_{3}$)$_{2}$Cl$_{2-}$square planarII. Rh(en)$_{3}$$^{2+ }$III$^{. }$CoCl$_{4}$$^{2-}$-(Tetrahedral)Which can exhibit cis-trans isomerism? A) I. B) II. C) III. D) I, II. E) I, II and III. Show Answer Correct Answer: A) I. 2. In a coordination entity of the type [PtCl2(en)2]2+, which isomer shows optical activity? A) Cis-isomer. B) Trans-isomer. C) Facial isomer. D) Meridional isomer. Show Answer Correct Answer: A) Cis-isomer. 3. What are complexes that undergo substitution reaction at room temperature called? A) Kinetically labile. B) Kinetically inert. C) Stable. D) Unstable. Show Answer Correct Answer: A) Kinetically labile. 4. What role do chelating agents play in coordination chemistry? A) Chelating agents stabilize metal ions by forming multiple bonds, enhancing solubility and reactivity control. B) Chelating agents decrease the solubility of metal complexes. C) Chelating agents only bind to non-metal ions. D) Chelating agents are used to oxidize metal ions. Show Answer Correct Answer: A) Chelating agents stabilize metal ions by forming multiple bonds, enhancing solubility and reactivity control. 5. Which of the following best defines a coordination compound? A) A compound containing ionic bonds only. B) A compound in which a central metal atom or ion is bonded to surrounding molecules or ions by coordinate bonds. C) A compound formed by covalent bonds only. D) A compound consisting of only nonmetals. Show Answer Correct Answer: B) A compound in which a central metal atom or ion is bonded to surrounding molecules or ions by coordinate bonds. 6. Inner orbital complexes having ..... Hybridization. A) Sp3d2. B) D2Sp3. C) Sp3. D) Dsp2. Show Answer Correct Answer: B) D2Sp3. 7. The correct formula of tetraaquadichlorochromium (III) chloride is A) [CrCl$_{2}$(H$_{2}$O)$_{4}$]Cl$_{2}$. B) [CrCl$_{2}$(H$_{2}$O)$_{4}$]Cl. C) [CrCl$_{2}$(H$_{2}$O)$_{4}$]Cl$_{3}$. D) [CrCl$_{2}$(H$_{2}$O)$_{6}$]Cl. Show Answer Correct Answer: B) [CrCl$_{2}$(H$_{2}$O)$_{4}$]Cl. 8. Which is square planar? A) D10. B) D8 (strong field). C) D5. D) D3. Show Answer Correct Answer: B) D8 (strong field). 9. The secondary valency of the complex, K2[HgI4]-which is known Nessler's reagent is A) 2. B) 6. C) 4. D) 7. Show Answer Correct Answer: C) 4. 10. Which term describes the spatial arrangement of ligand atoms around a central atom? A) Coordination sphere. B) Coordination number. C) Coordination polyhedron. D) Ligand field. Show Answer Correct Answer: C) Coordination polyhedron. 11. Identify the lewis acid in the coordination entitiy. [CoCl(NH3)5]2+. A) NH3. B) Cl-. C) Co3+. D) All the above. Show Answer Correct Answer: C) Co3+. 12. A complex compound in which the oxidation number of a metal is zero is A) K4 [Fe (CN)6]. B) K3 [Fe (CN)6]. C) [Ni (CO)4]. D) [Pl (NH3 )4]Cl2. Show Answer Correct Answer: C) [Ni (CO)4]. 13. What is the effect of a strong ligand on the electrons of the central metal atom? A) The electrons get stabilized. B) The electrons get unpaired. C) The electrons get paired. D) The electrons get ionized. Show Answer Correct Answer: C) The electrons get paired. 14. What are isomers? A) Compounds with the same chemical formula and same arrangement of atoms. B) Compounds with the same chemical formula but different arrangement of atoms. C) Compounds with different chemical formula and same arrangement of atoms. D) Compounds with different chemical formula and different arrangement of atoms. Show Answer Correct Answer: B) Compounds with the same chemical formula but different arrangement of atoms. 15. Which of the following complexes is a heteroleptic complex? A) [CuCl2(NH3)2]. B) [Co(NH3)4Cl2]+. C) [Co(NH3)6]3+. D) [Ni(CO)4]. Show Answer Correct Answer: B) [Co(NH3)4Cl2]+. 16. The charge of the sulfate ion is ..... A) 2+. B) 1-. C) 2-. D) 1+. Show Answer Correct Answer: C) 2-. 17. How does the geometry of a coordination compound affect its properties? A) All coordination compounds have the same geometry. B) Geometry only affects the color of the compound. C) The geometry has no effect on the properties. D) Different geometries can influence reactivity and stability. Show Answer Correct Answer: D) Different geometries can influence reactivity and stability. 18. The ionisation isomer of [Cr(H2O)4Cl(NO2)C] is A) [Cr(H2O)4(O2N)]Cl2. B) [Cr(H2O)4Cl2](NO2). C) [Cr(H2O)4Cl(ONO)Cl. D) [Cr(H2O)4Cl2(NO2)] H2O. Show Answer Correct Answer: B) [Cr(H2O)4Cl2](NO2). 19. Who was the first to formulate the theory of coordination compounds? A) Alfred Werner. B) Linus Pauling. C) Marie Curie. D) Dmitri Mendeleev. Show Answer Correct Answer: A) Alfred Werner. 20. The coordination number and the oxidation state of the element 'Co' in the complex [Co(en)$_{2}$Cl$_{2}$]$^{+}$(where (en) is ethylene diamine) are, respectively- A) 6 and +2. B) 4 and +2. C) 4 and +3. D) 6 and +3. Show Answer Correct Answer: D) 6 and +3. 21. The number of ions formed on dissolving one molecule of FeSO4(NH4)2SO4.6H2O in water is A) 4. B) 5. C) 3. D) 6. Show Answer Correct Answer: D) 6. 22. What are the main types of ligands in coordination chemistry? A) Simple, complex, and hybrid ligands. B) Hexadentate, octadentate, and tetradentate ligands. C) Monodentate, bidentate, and polydentate ligands. D) Cationic, anionic, and neutral ligands. Show Answer Correct Answer: C) Monodentate, bidentate, and polydentate ligands. 23. The isomers have different atom to atom bonding are called A) Structural isomers. B) Stereoisomers. C) Optical isomers. D) Geometrical isomers. Show Answer Correct Answer: A) Structural isomers. 24. What is the term for a ligand that has two different donor atoms and can bind through either of them? A) Chelate. B) Ambidentate. C) Hexadentate. D) Monodentate. Show Answer Correct Answer: B) Ambidentate. 25. Which of the following compounds can exhibit cis-trans isomerism? A) [Fe(CO)5NO2] 2+. B) [Cu(CO)5Cl]+. C) [MnClBr3] 2-. D) [Ni(CO)2(NH3)2] 2+. Show Answer Correct Answer: D) [Ni(CO)2(NH3)2] 2+. ← 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