TRB BT Assistant - Transition Elements and Their Compounds Online Test (MCQ Quiz)

1. Which of the following is the defining characteristic of transition elements in the periodic table?

A) They have a completely filled d-subshell. B) They have incompletely filled d-subshells in their elemental state or in common oxidation states. C) They are all gases at room temperature. D) They belong to Group 1 or 2 of the periodic table.

2. What is the electronic configuration of the element Scandium (Sc)?

A) [Ar] 3d¹ 4s² B) [Ar] 3d² 4s¹ C) [Ar] 3d³ D) [Ar] 4s² 3d⁰

3. Which transition metal ion is responsible for the characteristic blue color of the flame test for copper?

A) Cu⁺ B) Cu²⁺ C) Cu³⁺ D) Cu⁰

4. Which of the following is NOT a common oxidation state of Iron (Fe)?

A) +2 B) +3 C) +4 D) +1

5. The complex ion [Cu(NH₃)₄]²⁺ has what geometry and color?

A) Tetrahedral, yellow B) Square planar, blue C) Octahedral, green D) Tetrahedral, blue

6. Which transition metal exhibits the highest number of oxidation states?

A) Iron (Fe) B) Manganese (Mn) C) Chromium (Cr) D) Vanadium (V)

7. What is the primary reason for the colored nature of transition metal compounds?

A) The presence of lone pairs of electrons. B) The absorption of visible light due to d-d transitions. C) The high ionization energy of the metal ion. D) The formation of ionic bonds.

8. Which of the following is a characteristic property of transition metals regarding magnetism?

A) They are all diamagnetic. B) They are all paramagnetic. C) They exhibit variable magnetic properties due to unpaired electrons. D) They are all ferromagnetic.

9. What is the electronic configuration of Chromium (Cr)?

A) [Ar] 3d⁵ 4s¹ B) [Ar] 3d⁴ 4s² C) [Ar] 3d⁶ D) [Ar] 3d³ 4s²

10. Which compound of Chromium is used as a yellow pigment in paints and ceramics?

A) Chromium(III) oxide (Cr₂O₃) B) Potassium dichromate (K₂Cr₂O₇) C) Lead chromate (PbCrO₄) D) Chromium(VI) oxide (CrO₃)

11. The ability of transition metals to form alloys is primarily due to:

A) Their high melting points. B) Their similar atomic sizes and crystal structures. C) Their ability to form ionic compounds. D) Their tendency to exhibit multiple oxidation states.

12. Which of the following is a strong oxidizing agent in acidic solution?

A) Fe²⁺ B) Mn²⁺ C) Cr³⁺ D) MnO₄⁻ (Permanganate ion)

13. What is the common oxidation state of Copper in its compounds?

A) +1 and +3 B) +2 and +4 C) +1 and +2 D) +3 and +4

14. The catalytic activity of transition metals is often attributed to:

A) Their high density. B) The presence of vacant d-orbitals which can adsorb reactants. C) Their low melting points. D) Their inert chemical nature.

15. Which transition metal is essential for oxygen transport in the blood?

A) Copper (Cu) B) Iron (Fe) C) Manganese (Mn) D) Cobalt (Co)

16. What is the electronic configuration of Vanadium (V)?

A) [Ar] 3d³ 4s² B) [Ar] 3d⁴ 4s¹ C) [Ar] 3d⁵ D) [Ar] 3d² 4s³

17. Which of the following is an example of a coordination compound involving a transition metal?

A) NaCl B) H₂O C) [Co(NH₃)₆]Cl₃ D) CH₄

18. The formation of colored ions in transition metals is due to:

A) Spin-orbit coupling. B) Crystal field splitting of d-orbitals. C) Jahn-Teller effect. D) Ligand field theory.

19. Which metal forms the alloy 'Bronze' with Tin?

A) Iron B) Copper C) Nickel D) Aluminum

20. The oxidation state of Manganese in KMnO₄ is:

A) +2 B) +4 C) +6 D) +7

21. Which of the following is the most stable oxidation state of Cobalt (Co)?

A) +1 B) +2 C) +3 D) +4

22. What is the characteristic property of transition metals that allows them to form interstitial compounds?

A) Their large atomic radii. B) Their ability to form multiple oxidation states. C) Their relatively small interstitial voids in their crystal lattices. D) Their high electronegativity.

23. Which of the following is an ore of Iron?

A) Bauxite B) Haematite C) Carnallite D) Cryolite

24. The magnetic moment of an ion is calculated using the formula:

A) μ = √(n+2) Bohr magnetons B) μ = √n(n+2) Bohr magnetons C) μ = n Bohr magnetons D) μ = n² Bohr magnetons

25. Which transition metal compound is known for its use in photography as a light-sensitive salt?

A) Silver chloride (AgCl) B) Copper(I) chloride (CuCl) C) Iron(III) chloride (FeCl₃) D) Nickel(II) chloride (NiCl₂)

26. What is the oxidation state of Manganese in MnO₂?

A) +2 B) +3 C) +4 D) +6

27. The complex ion [Fe(CN)₆]⁴⁻ is:

A) Paramagnetic B) Diamagnetic C) Ferromagnetic D) Antiferromagnetic

28. Which of the following transition metals has the highest melting point?

A) Iron (Fe) B) Cobalt (Co) C) Nickel (Ni) D) Tungsten (W)

29. The blue color of copper sulfate solution is due to the presence of which ion?

A) Cu⁺ B) Cu²⁺ C) SO₄²⁻ D) H₂O

30. What is the electronic configuration of Copper (Cu)?

A) [Ar] 3d⁹ 4s² B) [Ar] 3d¹⁰ 4s¹ C) [Ar] 3d⁸ 4s² D) [Ar] 3d¹⁰ 4s⁰

31. Which element is used in the production of stainless steel and has the symbol Cr?

A) Cobalt B) Nickel C) Chromium D) Molybdenum

32. Which of the following is a characteristic property of transition metal ions that leads to complex formation?

A) Their large size and low charge density. B) Their small size and high charge density, and presence of vacant d-orbitals. C) Their inertness and lack of variable oxidation states. D) Their gaseous state at room temperature.

33. The compound K₂Cr₂O₇ is commonly used as:

A) A reducing agent B) An oxidizing agent C) A catalyst D) A drying agent

34. What is the oxidation state of Vanadium in the vanadate ion, VO₄³⁻?

A) +3 B) +4 C) +5 D) +2

35. Which of the following transition metals is used in making magnets?

A) Silver B) Gold C) Iron, Cobalt, Nickel D) Platinum

36. The lanthanides and actinides are collectively known as:

A) Alkali metals B) Alkaline earth metals C) Inner transition metals D) Halogens

37. What is the common name for the alloy of Copper and Zinc?

A) Bronze B) Brass C) Steel D) Solder

38. Which of the following compounds of Iron is green in color?

A) FeCl₃ B) Fe₂O₃ C) FeSO₄·7H₂O D) Fe³⁺

39. The ability of transition metals to form colored compounds is a consequence of:

A) Metallic bonding. B) Ionic bonding. C) The absorption and emission of light energy by unpaired electrons in d-orbitals. D) The formation of alloys.

40. Which transition metal ion is a component of hemoglobin and is responsible for oxygen transport?

A) Copper B) Cobalt C) Iron D) Manganese

41. What is the electronic configuration of Manganese (Mn)?

A) [Ar] 3d⁵ 4s² B) [Ar] 3d⁶ 4s¹ C) [Ar] 3d⁴ 4s³ D) [Ar] 3d⁷

42. The compound AgCl is:

A) Soluble in water B) Insoluble in water C) Slightly soluble in water D) Decomposed by water

43. Which of the following is NOT a property of transition elements?

A) They exhibit variable oxidation states. B) They form colored compounds. C) They are generally poor conductors of heat and electricity. D) They can form complex ions.

44. What is the characteristic color of a solution containing Ni²⁺ ions?

A) Red B) Yellow C) Green D) Blue

45. The use of transition metals as catalysts is often due to:

A) Their high density. B) Their low melting points. C) The ability to provide surfaces for reactions and change oxidation states. D) Their inert nature.

46. Which of the following is an example of a ferromagnetic material among transition metals?

A) Copper B) Silver C) Iron D) Gold

47. The oxidation state of Copper in Cu₂O is:

A) +1 B) +2 C) +3 D) 0

48. Which of the following elements is NOT considered a transition element?

A) Fe B) Cu C) Zn D) Mn

49. The compound HgS is:

A) Soluble in dilute acids B) Insoluble in dilute acids but soluble in aqua regia C) Soluble in water D) Decomposed by light

50. What is the primary reason for the high density of transition metals?

A) Their large atomic radii. B) Their strong metallic bonding and relatively large atomic masses. C) Their low ionization energies. D) Their tendency to form ionic compounds.

Transition Elements and Their Compounds - Online Test

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