Coordination compounds Werner's theory ligands coordination number and isomerism - One Line Questions

1. Which of the following complexes has a coordination number of 4 for the central metal ion? — [PtCl2(NH3)2]
2. Which of the following pairs exhibits coordination isomerism? — All of the above
3. Which type of complex is likely to exhibit optical isomerism? — [M(en)3]3+
4. In the complex [Co(NH3)6]^3+, what is the coordination number of Cobalt (Co)? — 6
5. In the complex [Ni(en)2Cl2], what is the coordination number of Nickel (Ni)? — 6
6. A coordination compound that is non-superimposable on its mirror image is called: — Chiral
7. In a square planar complex [Ma2b2], the cis isomer has the two 'a' ligands in: — Adjacent positions
8. In a square planar complex [Ma2b2], the trans isomer has the two 'a' ligands in: — Opposite positions
9. In an octahedral complex [Ma4b2], the cis isomer has the two 'b' ligands in: — Adjacent positions (90° apart)
10. In an octahedral complex [Ma4b2], the trans isomer has the two 'b' ligands in: — Opposite positions (180° apart)
11. The term 'coordination number' was introduced by whom in the context of coordination compounds? — Alfred Werner
12. Which of the following is a bidentate ligand? — Oxalate ion (C2O4^2-)
13. Which of the following is an ambidentate ligand? — Nitrite ion (NO2-)
14. A ligand that can bind to the central metal atom through only one donor atom is called: — Monodentate ligand
15. In linkage isomerism, the ligand that can coordinate through more than one donor atom is called: — Ambidentate ligand
16. What are the species that donate electron pairs to the central metal atom/ion called in coordination compounds? — Ligands
17. A mixture of equal amounts of two enantiomers is called a: — Racemic mixture
18. Which type of geometrical isomerism is possible for an octahedral complex of the type [Ma4b2]? — cis and trans
19. Geometrical isomerism in coordination compounds arises due to different: — Spatial arrangement of ligands
20. The complex [Co(NH3)5(NO2)]Cl2 and [Co(NH3)5(ONO)]Cl2 exhibit which type of isomerism? — Linkage isomerism
21. Primary valency in Werner's theory corresponds to which property of the central metal ion? — Oxidation State
22. Who proposed the theory to explain the structure and bonding in coordination compounds? — Werner
23. Which of the following is an example of a monodentate ligand? — Chloride ion (Cl-)
24. Which type of geometrical isomerism is possible for a square planar complex of the type [Ma2b2]? — cis and trans
25. Stereoisomerism in coordination compounds includes which of the following types? — Geometrical and Optical isomerism
26. Ionization isomerism occurs when the difference between isomers is in the nature of the ion: — Outside the coordination sphere only
27. Which of the following is NOT a type of structural isomerism in coordination compounds? — Optical isomerism
28. Ligands are also known as: — Lewis bases
29. Which of the following statements about ligands is INCORRECT? — Ligands can only bind to the central metal ion through one atom.
30. Hydration isomerism is a specific type of isomerism where water molecules are involved as: — Both ligands and counter ions
31. The complexes [Co(NH3)4Br2]Cl and [Co(NH3)4BrCl]Br exhibit which type of isomerism? — Ionization isomerism
32. Ethylenediamine (en) is an example of which type of ligand? — Bidentate
33. EDTA (Ethylenediaminetetraacetic acid) is typically a ligand of what denticity? — Hexadentate
34. A ligand that can bind to the central metal atom through two donor atoms is called: — Bidentate ligand
35. In the complex [Pt(NH3)2Cl2], which arrangement of ligands leads to 'cis' isomer? — Both NH3 ligands are adjacent to each other
36. According to Werner's theory, coordination compounds possess how many types of valencies? — Two
37. The complex [Co(en)2Cl2]+ exhibits which type of isomerism? — Both geometrical and optical isomerism
38. Consider the complex [Co(en)2(NO2)2]+. This complex can exhibit geometrical isomerism. The cis isomer of this complex is chiral and exhibits: — Optical isomerism
39. Secondary valency in Werner's theory is directional and corresponds to which property? — Coordination Number
40. The number of donor atoms present in a ligand is referred to as its: — Denticity
41. What are the two types of valencies proposed by Werner? — Primary and Secondary
42. Which type of valency is satisfied by coordinate bonds in coordination compounds according to Werner? — Secondary valency
43. The phenomenon where two or more coordination compounds have the same molecular formula but differ in the arrangement of ligands around the central metal ion is called: — Isomerism
44. Which type of valency is satisfied by ionic bonds in coordination compounds according to Werner? — Primary valency
45. Which type of isomerism arises due to differences in the connectivity of atoms or ligands in coordination compounds? — Structural isomerism
46. Coordination isomerism is a type of which broader category of isomerism? — Structural isomerism
47. Optical isomerism occurs when a coordination compound is: — Non-superimposable on its mirror image
48. In coordination isomerism, the difference lies in the composition of: — The complex cation and complex anion
49. Werner's theory successfully explained the properties of coordination compounds by proposing: — Primary and secondary valencies
50. The coordination number of a central metal ion is defined as: — The number of coordinate bonds formed by the central metal ion with ligands.
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