This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Chemistry (Part Ii) Chapter 9 Coordination Compounds – Quiz 19 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Chemistry (Part Ii) Chapter 9 Coordination Compounds Quiz 19 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. 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. 2. Which one is an anionic complex? A) K[Ag(CN)$_{2}$]. B) [Ag(NH$_{3}$)$_{2}$]Cl. C) [Ni(CO)$_{4}$]. D) [Co(NH$_{3}$)$_{6}$]Cl$_{3}$. Show Answer Correct Answer: A) K[Ag(CN)$_{2}$]. 3. Which is inner orbital complex? A) [CoF6]3-. B) [Fe(CN)6]4-. C) [NiCl4]2-. D) [MnF6]3-. Show Answer Correct Answer: B) [Fe(CN)6]4-. 4. What is the role of charcoal in the preparation of Co(III) complexes? A) Acts as a catalyst. B) Acts as a reducing agent. C) Acts as a solvent. D) No role. Show Answer Correct Answer: A) Acts as a catalyst. 5. 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. 6. Which rule is used to predict the stability of coordination compounds? A) VBT (Valence Bond Theory). B) EAN rule. C) CFT (Crystal Field Theory). D) Octet rule. Show Answer Correct Answer: B) EAN rule. 7. How many unpaired electrons are there in a strong field iron (II) octahedral complex? A) 0. B) 1. C) 2. D) 4. Show Answer Correct Answer: A) 0. 8. 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. 9. Which type of isomerism occurs in octahedral coordination entities involving didentate ligands? A) Geometrical isomerism. B) Linkage isomerism. C) Structural isomerism. D) Optical isomerism. Show Answer Correct Answer: D) Optical isomerism. 10. What is the absorption frequency for free CO32-? A) 890 cm-1. B) 850 cm-1. C) 830 cm-1. D) 700 cm-1. Show Answer Correct Answer: A) 890 cm-1. 11. The bridging molecule among the following is A) [Mn$_{2}$(CO)$_{10}$]. B) [Cr(CO)6]. C) [Co$_{2}$(CO)$_{8}$]. D) [Fe(CO)5]. Show Answer Correct Answer: C) [Co$_{2}$(CO)$_{8}$]. 12. 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. 13. Which of the following coordination compounds will form a precipitate when treated with an aqueous solution of AgNO$_{3}$? A) [Cr(NH$_{3}$)$_{3}$Cl$_{3}$]. B) [Cr(NH$_{3}$)$_{6}$]Cl$_{3}$. C) [Cr(NH$_{3}$)Cl]NO$_{3}$. D) Na$_{3}$[Cr(CN)$_{6}$]. E) Na$_{3}$[CrCl$_{6}$]. Show Answer Correct Answer: B) [Cr(NH$_{3}$)$_{6}$]Cl$_{3}$. 14. 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. 15. Name a common complex that contains a transition metal and a halide ligand. A) FeBr3. B) NiF2. C) [CuCl4]2-. D) AgI. Show Answer Correct Answer: C) [CuCl4]2-. 16. Which of the transition metals is the best conductor of heat and electric current? A) Copper. B) Silver. C) Gold. D) Titanium. E) Tungsten. Show Answer Correct Answer: B) Silver. 17. 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. 18. 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. 19. 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. 20. Which complex is diamagnetic? A) [Ni(CO)4]. B) [CoF6]3-. C) [Fe(H2O)6]3+. D) [Cu(H2O)6]2+. Show Answer Correct Answer: A) [Ni(CO)4]. 21. Which of the following is the correct formula for tetracarbonylnickel(0)? A) Ni(CO)4. B) [Co(NH3)4(H2O)Cl]Cl2. C) K2[Zn(OH)4]. D) [CoCl2(en)2]I2. Show Answer Correct Answer: A) Ni(CO)4. 22. According to Werner's theory, what is the primary valence of CoCl3? A) 3. B) 2. C) 1. D) 4. Show Answer Correct Answer: A) 3. 23. What is the main postulate of Werner's theory regarding primary valencies? A) They are satisfied by neutral molecules. B) They are equal to the coordination number. C) They are satisfied by negative ions. D) They are non-ionisable. Show Answer Correct Answer: C) They are satisfied by negative ions. 24. 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) Ionisation isomerism. B) Solvate isomerism. C) Linkage isomerism. D) Coordination isomerism. Show Answer Correct Answer: D) Coordination isomerism. 25. The correct formula of Potassium diaquatetrachlorochromate (III) is A) K$_{2}$[CrCl$_{4}$(H$_{2}$O)$_{2}$]. B) K$_{2}$[CrCl$_{2}$(H$_{2}$O)$_{4}$]. C) K[CrCl$_{4}$(H$_{2}$O)$_{2}$]. D) K[CrCl$_{2}$(H$_{2}$O)$_{ 4}$]. Show Answer Correct Answer: C) K[CrCl$_{4}$(H$_{2}$O)$_{2}$]. ← 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