Werner's theory, ligands coordination number denticity and chelation - One Line Questions

1. Which of the following complexes is expected to be more stable, [Fe(CN)6]^4- or [Fe(en)3]^2+? — [Fe(en)3]^2+
2. Which of the following coordination compounds exhibits the chelate effect? — [Cu(en)2]^2+
3. In Werner's original work, the complex [Co(NH3)6]Cl3 was explained as having Co linked to six ammonia molecules by secondary valencies and the three chloride ions satisfied the primary valencies. What is the oxidation state of Co in this complex? — +3
4. For a complex like [Co(NH3)6]3+, what is the coordination number of Cobalt (Co)? — 6
5. What is the denticity of the ethylenediamine (en) ligand? — 2
6. What is the denticity of the oxalate ion (C2O4^2-)? — 2
7. What is the denticity of the cyanide ion (CN-)? — 1
8. The complex ion [Fe(CN)6]^3- has a coordination number of: — 6
9. What is the denticity of the acetylacetonate (acac) ligand? — 2
10. In [Ni(CO)4], the coordination number of Nickel (Ni) is: — 4
11. What is the coordination number of Platinum (Pt) in the complex [PtCl4]^2-? — 4
12. The denticity of the diamine ligand, NH2-CH2-CH2-NH2, is: — 2
13. The number of ionizable chloride ions in the complex [Co(NH3)5Cl]Cl2 is: — 2
14. The denticity of the thiocyanate ion (SCN-) can be: — 1 or 2
15. In the complex [Cr(en)3]^3+, the denticity of ethylenediamine (en) and the coordination number of Chromium (Cr) are respectively: — 2, 6
16. What is the coordination number of the central metal ion in the complex [PtCl2(en)2]? — 6
17. In the complex [Co(en)2Cl2]+, what is the coordination number of Co? — 6
18. In [Co(en)2Cl2]+, how many donor atoms are contributed by the ethylenediamine (en) ligands? — 4
19. In the complex [Cu(NH3)4]^2+, the coordination number of Copper (Cu) is: — 4
20. The complex [Co(NH3)5Cl]Cl2 shows that the five ammonia molecules and one chloride ion are attached to Co by secondary valencies. What is the coordination number of Co in this complex? — 6
21. Which of the following is a bidentate ligand? — Dipyridyl (bpy)
22. The secondary valency in Werner's theory is generally fixed for a given metal ion and is equal to its: — Coordination number
23. A ligand that can coordinate through one donor atom is termed: — Monodentate
24. Which of the following statements about chelation is FALSE? — Chelation requires only one donor atom from the ligand.
25. Which of the following ligands can form a chelate ring with a metal ion? — en (ethylenediamine)
26. The phenomenon where a polydentate ligand forms a stable ring structure with a metal ion is called: — Chelation
27. The process of formation of a chelate ring by a polydentate ligand with a metal ion is known as: — Chelation
28. In Werner's theory, primary valency is generally considered equivalent to: — Oxidation state
29. The number of coordinate bonds formed by a ligand with the central metal atom is called its: — Denticity
30. What is the term used for a molecule or ion that binds to a central metal atom to form a coordination complex? — Ligand
31. The number of donor atoms attached to the central metal atom in a coordination complex is called the: — Coordination number
32. Which of the following is a hexadentate ligand commonly used in analytical chemistry? — EDTA
33. Which of the following is a monodentate ligand? — Chloride ion (Cl-)
34. Which of the following is a polydentate ligand? — EDTA
35. Werner's theory successfully explained the properties of coordination compounds by proposing the existence of: — Primary and secondary valencies
36. Who proposed the theory to explain the structure and properties of coordination compounds? — Alfred Werner
37. The stability of coordination complexes formed by chelating ligands is known as the: — Chelate effect
38. The primary valency of a metal ion in a coordination compound is typically satisfied by: — Anions
39. The coordination number of a central metal atom represents the total number of: — All of the above
40. A ligand that can bind to the central metal atom through two donor atoms is called: — Bidentate
41. The ED TA ligand is an example of which type of ligand based on denticity? — Hexadentate
42. A ligand capable of coordinating through three donor atoms is called: — Tridentate
43. Which type of ligands are more effective in stabilizing coordination complexes due to the formation of a ring structure? — Chelating ligands
44. According to Werner's theory, what are the two types of valencies exhibited by the central metal atom in a coordination compound? — Primary and secondary
45. Which type of valency is responsible for the formation of the complex ion in a coordination compound? — Secondary valency
46. In Werner's theory, which valency satisfies the coordination number of the metal ion? — Secondary valency
47. Which of the following is NOT a characteristic of Werner's theory? — Secondary valency is non-directional.
48. Which of the following is a common example of a chelating agent used to remove heavy metal ions from the body? — BAL (British Anti-Lewisite)
49. Secondary valency in coordination compounds, according to Werner, is directed towards: — The ligands
50. The chelate effect is a manifestation of: — Entropy effect
All One Line Questions
E-Book Werner's theory, ligands coordination number denticity and chelation Online Test Werner's theory, ligands coordination number denticity and chelation Question Bank Werner's theory, ligands coordination number denticity and chelation