This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Chemistry (Part Ii) Chapter 9 Coordination Compounds – Quiz 11 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Chemistry (Part Ii) Chapter 9 Coordination Compounds Quiz 11 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which of the following is NOT a postulate of Werner's theory of coordination compounds? A) Primary valences are ionisable. B) Secondary valences are non-ionisable. C) Secondary valence is equal to the coordination number. D) Primary valence is always equal to the secondary valence. Show Answer Correct Answer: D) Primary valence is always equal to the secondary valence. 2. Define formation constant and its importance in coordination chemistry. A) The formation constant indicates the color of a metal-ligand complex. B) The formation constant is used to measure the temperature of a solution. C) The formation constant describes the size of a metal ion in coordination chemistry. D) The formation constant measures the stability of a metal-ligand complex in coordination chemistry. Show Answer Correct Answer: D) The formation constant measures the stability of a metal-ligand complex in coordination chemistry. 3. In the complex formation, the central metal atom / ion acts as A) Lewis base. B) Bronsted base. C) Lewis acid. D) Bronsted acid. Show Answer Correct Answer: C) Lewis acid. 4. In which one of the following species does the transition metal ion have d$^{3}$ electronic configuration? A) [Cr(NH$_{3}$)$_{6}$]$^{3+}$. B) [Co(OH$_{2}$)$_{6}$]$^{2+}$. C) [CoF$_{6}$]$^{3-}$. D) [Fe(CN)$_{6}$]$^{3-}$. Show Answer Correct Answer: A) [Cr(NH$_{3}$)$_{6}$]$^{3+}$. 5. Which term describes a complex that uses inner d orbitals in hybridisation? A) High spin complex. B) Spin free complex. C) Low spin or spin paired complex. D) Outer orbital complex. Show Answer Correct Answer: C) Low spin or spin paired complex. 6. The isomers that have differ in only arrangement of ligands coordinated to metal cation is called A) Stereoisomers. B) Structural isomers. C) Optical isomer. D) Geometrical isomers. Show Answer Correct Answer: A) Stereoisomers. 7. Ligands and central metal ions are respectively A) Lewis base and lewis acid. B) Lewis acid and lewis base. C) Both lewis acid. D) Bothlewis base. Show Answer Correct Answer: A) Lewis base and lewis acid. 8. What is the correct name for [CuCl2(NH3)2]? A) Diammine copper(I) dichloride. B) Bis(ammonia)dicopper(II) dichloride. C) Tetraammonia copper(II) chloride. D) Ammonium dichlorocuprate(II). Show Answer Correct Answer: B) Bis(ammonia)dicopper(II) dichloride. 9. Which geometry has 90$^\circ$ angles? A) Tetrahedral. B) Linear. C) Octahedral. D) Trigonal planar. Show Answer Correct Answer: C) Octahedral. 10. Which has zero CFSE? A) D0. B) D10. C) D5 high spin. D) All. Show Answer Correct Answer: D) All. 11. What is the hybridization of [FeCl6]4-and [Fe(CN)6]4-respectively, given their spin magnetic moments are 4.9 BM and 0 BM? A) Sp3d2 and d2sp3. B) D2sp3 and sp3d2. C) Sp3 and dsp2. D) Dsp2 and sp3. Show Answer Correct Answer: A) Sp3d2 and d2sp3. 12. NaKSO4 is an example of A) Acid salt. B) Complex salt. C) Double salt. D) Mixed salt. Show Answer Correct Answer: D) Mixed salt. 13. What is the IUPAC name for [Co(NH3)5Cl]Cl2? A) Pentaamminecobalt(II) chloride. B) Tetraamminecobalt(II) chloride. C) Hexamminecobalt(III) chloride. D) Pentaamminechlorocobalt(III) chloride. Show Answer Correct Answer: D) Pentaamminechlorocobalt(III) chloride. 14. What is the coordination number of the metal in [Fe(CN)$_{6}$]$^{4-}$? A) 2. B) 4. C) 6. D) 8. Show Answer Correct Answer: C) 6. 15. Which of the following factors tends to increase the stability of metal ion complexes A) Higher ionic radius of the metal ion. B) Higher charge/size ratio of the metal ion. C) Lower ionization potential of the metal ion. D) Lower basicity of the ligand. Show Answer Correct Answer: B) Higher charge/size ratio of the metal ion. 16. Zn complexes are white in colour. Zn is A) A transition metal. B) Is a transition metal will all electrons filled. C) Is a transition metal but transition of electrons does not occur. D) Not a transition metal. Show Answer Correct Answer: B) Is a transition metal will all electrons filled. 17. How do you determine the coordination number of a metal in a coordination compound? A) By the solubility of the compound in water. B) By analyzing the color of the compound. C) By measuring the size of the metal ion. D) By counting the number of ligands attached to the metal ion. Show Answer Correct Answer: D) By counting the number of ligands attached to the metal ion. 18. What happens when you mix colors in coordination compounds? A) Mixing colors in coordination compounds results in a brighter shade of the original color. B) Colors in coordination compounds do not change when mixed together. C) Mixing colors in coordination compounds creates a colorless solution. D) Mixing colors in coordination compounds results in a new color based on the absorption properties of the ligands and metal. Show Answer Correct Answer: D) Mixing colors in coordination compounds results in a new color based on the absorption properties of the ligands and metal. 19. What is the oxidation state of cobalt in [Co(NH3)6]Cl3? A) +3. B) +4. C) +1. D) +2. Show Answer Correct Answer: A) +3. 20. What is the magnetic nature of a coordination compound with all electrons paired? A) Antiferromagnetic. B) Ferromagnetic. C) Paramagnetic. D) Diamagnetic. Show Answer Correct Answer: D) Diamagnetic. 21. Which type of isomerism is not possible in tetrahedral complexes having two different types of unidentate ligands coordinated with the central metal ion? A) Geometrical isomerism. B) Optical isomerism. C) Linkage isomerism. D) Ionization isomerism. Show Answer Correct Answer: A) Geometrical isomerism. 22. What is the role of a ligand in a coordination compound? A) Accepting a pair of electrons from the central metal atom. B) Providing stability to the compound. C) Acting as a counter ion. D) Donating a pair of electrons to the central metal atom. Show Answer Correct Answer: D) Donating a pair of electrons to the central metal atom. 23. Name a common example of a coordination compound used in medicine. A) Penicillin. B) Aspirin. C) Cisplatin. D) Ibuprofen. Show Answer Correct Answer: C) Cisplatin. 24. The oxidation state of Cr in [Cr(NH3)4Cl2]+ is A) +3. B) +2. C) +1. D) 0. Show Answer Correct Answer: A) +3. 25. According to Warner's Theory, what are the two types of valencies that a metal atom in a coordination compound has? A) Primary and secondary. B) Inner and outer. C) Positive and negative. D) Ionic and covalent. Show Answer Correct Answer: A) Primary and secondary. ← 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