d-Block and f-Block Elements - Question Bank

1. Which of the following is a property that distinguishes d-block elements from f-block elements?
A) Variable oxidation states
B) Formation of colored compounds
C) Lanthanide/Actinide contraction
D) Paramagnetism
2. The concept of 'inner transition elements' refers to:
A) p-block elements
B) d-block elements
C) f-block elements
D) g-block elements
3. The reduction potential of transition metal ions generally:
A) Increases across a period
B) Decreases across a period
C) Remains constant across a period
D) Increases down a group
4. Which of the following transition metals has the highest melting point?
A) Iron (Fe)
B) Tungsten (W)
C) Platinum (Pt)
D) Molybdenum (Mo)
5. The formation of interstitial compounds by transition metals is due to:
A) Their large atomic size
B) Their small atomic size and vacant interstitial spaces
C) Their tendency to form ionic bonds
D) Their high electronegativity
6. The element Gadolinium (Gd) is known for its strong magnetic properties and is used in:
A) Medical imaging (MRI contrast agents)
B) Nuclear fuel
C) Catalysts
D) Superconductors
7. The actinide series starts with Actinium (Ac) and ends with:
A) Lawrencium (Lr)
B) Rutherfordium (Rf)
C) Dubnium (Db)
D) Nobelium (No)
8. The lanthanide series starts with Lanthanum (La) and ends with:
A) Lutetium (Lu)
B) Hafnium (Hf)
C) Tantalum (Ta)
D) Rhenium (Re)
9. Which of the following elements is known for its resistance to corrosion and is used in stainless steel?
A) Copper (Cu)
B) Nickel (Ni)
C) Chromium (Cr)
D) Titanium (Ti)
10. The high density of transition metals is attributed to:
A) Small atomic radii and strong metallic bonds
B) Large atomic radii and weak metallic bonds
C) Low ionization energies
D) Tendency to form ions
11. Which of the following is a common use of chromium compounds?
A) Fertilizers
B) Electroplating
C) Catalysts in polymerization
D) Pigments for paints
12. The element Promethium (Pm) is unique among lanthanides because it is:
A) Artificial and radioactive
B) Naturally occurring and radioactive
C) Artificial and stable
D) Naturally occurring and stable
13. Which of the following is a characteristic of actinides but not typically of lanthanides?
A) Formation of strongly colored ions
B) Extensive complex formation
C) Larger variation in oxidation states
D) Lanthanide contraction
14. The last element of the 3d series is:
A) Copper (Cu)
B) Zinc (Zn)
C) Nickel (Ni)
D) Cobalt (Co)
15. The first element of the 3d series is:
A) Scandium (Sc)
B) Titanium (Ti)
C) Vanadium (V)
D) Chromium (Cr)
16. The process of forming complexes by transition metals is facilitated by:
A) Large size and low charge density
B) Small size and high charge density
C) Presence of only s electrons
D) Complete filling of d orbitals
17. Which of the following compounds of transition metals is diamagnetic?
A) Ti³⁺
B) V²⁺
C) Sc³⁺
D) Cr³⁺
18. The maximum oxidation state exhibited by an element in the first transition series generally corresponds to:
A) The number of electrons in the s subshell
B) The number of electrons in the d subshell
C) The sum of electrons in the s and d subshells
D) The number of protons in the nucleus
19. The ability of transition metals to form alloys is due to:
A) Similar atomic sizes and crystal structures
B) Large differences in atomic sizes
C) Formation of ionic bonds
D) High reactivity with other metals
20. Which of the following d-block elements is a liquid at room temperature?
A) Iron (Fe)
B) Copper (Cu)
C) Mercury (Hg)
D) Silver (Ag)
21. The magnetic properties of transition metals arise from:
A) Unpaired electrons in s orbitals
B) Unpaired electrons in p orbitals
C) Unpaired electrons in d orbitals
D) Paired electrons in d orbitals
22. Which of the following is a property of d-block elements that is also exhibited by f-block elements?
A) Formation of colorless compounds
B) Generally exhibit a single stable oxidation state
C) Formation of colored compounds
D) High ionization energy
23. Lanthanide contraction has a significant effect on the properties of:
A) The elements in the same period
B) The elements in the same group below them
C) The elements in the same group above them
D) The noble gases
24. Lanthanide contraction is due to poor shielding of:
A) s-electrons by d-electrons
B) p-electrons by d-electrons
C) d-electrons by f-electrons
D) f-electrons by d-electrons
25. The contraction in ionic radii across the lanthanide series is known as:
A) Actinide contraction
B) Lanthanide contraction
C) Diagonal relationship
D) Periodic trend
26. Which actinide is used in nuclear reactors as fuel?
A) Thorium (Th)
B) Protactinium (Pa)
C) Uranium (U)
D) Neptunium (Np)
27. The characteristic property of actinides is that they exhibit:
A) A single stable oxidation state
B) Variable oxidation states, with +3 being common
C) Only positive oxidation states
D) Only negative oxidation states
28. Which of the following lanthanide ions is colorless?
A) Ce³⁺
B) Pr³⁺
C) Nd³⁺
D) Lu³⁺
29. The most common oxidation state of lanthanides is:
A) +1
B) +2
C) +3
D) +4
30. Actinides, starting from Thorium (90) onwards, are also known as:
A) Lanthanides
B) Transuranic elements
C) Inner transition elements
D) Chalcogens
31. Lanthanides are also known as:
A) Rare earth elements
B) Transuranic elements
C) Noble metals
D) Alkaline earth metals
32. The f-block elements are placed in:
A) The main body of the periodic table
B) Separate rows at the bottom of the periodic table
C) Separate columns at the right of the periodic table
D) Separate columns at the left of the periodic table
33. Which of the following is an actinide element?
A) Lanthanum (La)
B) Cerium (Ce)
C) Neodymium (Nd)
D) Uranium (U)
34. Which of the following is a lanthanide element?
A) Thorium (Th)
B) Uranium (U)
C) Cerium (Ce)
D) Plutonium (Pu)
35. Actinides are elements in which the differentiating electron enters the:
A) 4f orbital
B) 5f orbital
C) 6f orbital
D) 7f orbital
36. Lanthanides are elements in which the differentiating electron enters the:
A) 4f orbital
B) 5f orbital
C) 6f orbital
D) 7f orbital
37. The general electronic configuration of f-block elements is:
A) ns² np⁶ (n-1)d¹⁻¹⁰ (n-2)f¹⁻¹⁴
B) ns² (n-1)d¹⁻¹⁰
C) ns² np¹⁻⁶
D) ns¹⁻² (n-1)d⁰⁻¹⁰
38. The lanthanides and actinides are collectively known as:
A) d-block elements
B) p-block elements
C) s-block elements
D) f-block elements
39. Which of the following is NOT considered a transition element according to IUPAC definition?
A) Copper (Cu)
B) Zinc (Zn)
C) Silver (Ag)
D) Gold (Au)
40. The catalytic activity of transition metals is due to:
A) Variable oxidation states and ability to form complexes
B) Low ionization enthalpy
C) Formation of stable ionic compounds
D) High electronegativity
41. Which of the following is a common property of transition metal ions in aqueous solution?
A) Paramagnetism
B) Diamagnetism
C) Non-magnetic behavior
D) Ferromagnetism
42. Transition metals generally form colored compounds because:
A) They absorb light in the visible region due to d-d transitions
B) They absorb light in the UV region due to d-d transitions
C) They reflect light in the visible region due to d-d transitions
D) They emit light in the visible region due to d-d transitions
43. Which of the following transition metals exhibits the highest number of oxidation states?
A) Iron (Fe)
B) Manganese (Mn)
C) Chromium (Cr)
D) Vanadium (V)
44. The elements in which the differentiating electron enters the (n-1)d orbital are called:
A) p-block elements
B) s-block elements
C) d-block elements
D) f-block elements
45. Which period in the periodic table contains the first series of d-block elements (3d series)?
A) Period 2
B) Period 3
C) Period 4
D) Period 5
46. The elements of the d-block are also known as:
A) Alkali metals
B) Halogens
C) Transition elements
D) Noble gases
47. Which of the following is NOT a d-block element?
A) Iron (Fe)
B) Copper (Cu)
C) Zinc (Zn)
D) Calcium (Ca)
48. The general electronic configuration of d-block elements is:
A) ns² np¹⁻⁶
B) ns² (n-1)d¹⁻¹⁰
C) ns¹⁻²
D) ns² np⁶ (n-1)d⁰⁻¹⁰
49. Which of the following is a characteristic property of d-block elements?
A) Formation of acidic oxides
B) Variable oxidation states
C) Formation of ionic compounds
D) High ionization energy
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