Transition Elements and Their Compounds - One Line Questions

1. What is the electronic configuration of the element Scandium (Sc)? — [Ar] 3d¹ 4s²
2. What is the electronic configuration of Vanadium (V)? — [Ar] 3d³ 4s²
3. What is the electronic configuration of Chromium (Cr)? — [Ar] 3d⁵ 4s¹
4. What is the electronic configuration of Manganese (Mn)? — [Ar] 3d⁵ 4s²
5. What is the electronic configuration of Copper (Cu)? — [Ar] 3d¹⁰ 4s¹
6. Which of the following is the most stable oxidation state of Cobalt (Co)? — +2
7. The oxidation state of Copper in Cu₂O is: — +1
8. What is the common oxidation state of Copper in its compounds? — +1 and +2
9. Which of the following is NOT a common oxidation state of Iron (Fe)? — +1
10. The oxidation state of Manganese in KMnO₄ is: — +7
11. What is the oxidation state of Manganese in MnO₂? — +4
12. What is the oxidation state of Vanadium in the vanadate ion, VO₄³⁻? — +5
13. The compound K₂Cr₂O₇ is commonly used as: — An oxidizing agent
14. The lanthanides and actinides are collectively known as: — Inner transition metals
15. Which of the following is an ore of Iron? — Haematite
16. What is the common name for the alloy of Copper and Zinc? — Brass
17. Which compound of Chromium is used as a yellow pigment in paints and ceramics? — Lead chromate (PbCrO₄)
18. Which element is used in the production of stainless steel and has the symbol Cr? — Chromium
19. Which transition metal ion is a component of hemoglobin and is responsible for oxygen transport? — Iron
20. Which of the following is an example of a ferromagnetic material among transition metals? — Iron
21. Which transition metal is essential for oxygen transport in the blood? — Iron (Fe)
22. Which transition metal ion is responsible for the characteristic blue color of the flame test for copper? — Cu²⁺
23. The blue color of copper sulfate solution is due to the presence of which ion? — Cu²⁺
24. Which of the following elements is NOT considered a transition element? — Zn
25. Which of the following is a strong oxidizing agent in acidic solution? — MnO₄⁻ (Permanganate ion)
26. Which of the following compounds of Iron is green in color? — FeSO₄·7H₂O
27. Which metal forms the alloy 'Bronze' with Tin? — Copper
28. Which transition metal exhibits the highest number of oxidation states? — Manganese (Mn)
29. Which of the following transition metals has the highest melting point? — Tungsten (W)
30. The ability of transition metals to form colored compounds is a consequence of: — The absorption and emission of light energy by unpaired electrons in d-orbitals.
31. Which of the following is an example of a coordination compound involving a transition metal? — [Co(NH₃)₆]Cl₃
32. The complex ion [Fe(CN)₆]⁴⁻ is: — Diamagnetic
33. What is the characteristic color of a solution containing Ni²⁺ ions? — Green
34. Which of the following transition metals is used in making magnets? — Iron, Cobalt, Nickel
35. Which transition metal compound is known for its use in photography as a light-sensitive salt? — Silver chloride (AgCl)
36. The compound HgS is: — Insoluble in dilute acids but soluble in aqua regia
37. The compound AgCl is: — Insoluble in water
38. The formation of colored ions in transition metals is due to: — Crystal field splitting of d-orbitals.
39. The complex ion [Cu(NH₃)₄]²⁺ has what geometry and color? — Square planar, blue
40. What is the primary reason for the colored nature of transition metal compounds? — The absorption of visible light due to d-d transitions.
41. The catalytic activity of transition metals is often attributed to: — The presence of vacant d-orbitals which can adsorb reactants.
42. The use of transition metals as catalysts is often due to: — The ability to provide surfaces for reactions and change oxidation states.
43. The ability of transition metals to form alloys is primarily due to: — Their similar atomic sizes and crystal structures.
44. What is the characteristic property of transition metals that allows them to form interstitial compounds? — Their relatively small interstitial voids in their crystal lattices.
45. What is the primary reason for the high density of transition metals? — Their strong metallic bonding and relatively large atomic masses.
46. Which of the following is a characteristic property of transition metal ions that leads to complex formation? — Their small size and high charge density, and presence of vacant d-orbitals.
47. Which of the following is a characteristic property of transition metals regarding magnetism? — They exhibit variable magnetic properties due to unpaired electrons.
48. Which of the following is NOT a property of transition elements? — They are generally poor conductors of heat and electricity.
49. Which of the following is the defining characteristic of transition elements in the periodic table? — They have incompletely filled d-subshells in their elemental state or in common oxidation states.
50. The magnetic moment of an ion is calculated using the formula: — μ = √n(n+2) Bohr magnetons
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