Questions on Transition Metals (d-block elements)
Multiple-Choice Questions: Transition Metals (d-block elements)
Basic Concepts & Properties
1. Which of the following is a transition metal?
A) Sodium
B) Calcium
C) Iron
D) Aluminum
E) Lead
2. Transition metals are typically found in which block of the periodic table?
A) s-block
B) p-block
C) d-block
D) f-block
E) g-block
3. What is a common property of transition metals?
A) They are non-conductors of electricity
B) They exist only as gases at room temperature
C) They often have multiple oxidation states
D) They form only covalent compounds
E) They do not form colored compounds
4. Which of the following transition metals is liquid at room temperature?
A) Nickel
B) Mercury
C) Zinc
D) Iron
E) Chromium
5. Which of these elements is not considered a transition metal?
A) Copper
B) Zinc
C) Titanium
D) Manganese
E) Chromium
Electronic Structure & Reactivity
6. Why do transition metals exhibit variable oxidation states?
A) Due to their inertness
B) Due to their full s-orbitals
C) Due to the involvement of d-electrons in bonding
D) Because of low ionization energies
E) Because they are noble gases
7. Which of the following transition metals is most commonly used in steel production?
A) Copper
B) Silver
C) Gold
D) Iron
E) Zinc
8. What is the electron configuration of Fe²⁺?
A) [Ar] 4s² 3d⁶
B) [Ar] 3d⁶
C) [Ar] 4s¹ 3d⁷
D) [Ar] 4s² 3d⁴
E) [Ar] 3d⁸
9. Which of the following is a typical characteristic of transition metals?
A) Poor conductivity
B) Formation of colorless compounds
C) Formation of complex ions
D) Low melting points
E) Lack of magnetic properties
10. Which transition metal is essential for oxygen transport in the human body?
A) Zinc
B) Manganese
C) Copper
D) Iron
E) Chromium
Colors, Compounds & Coordination Chemistry
11. Transition metal compounds often display vivid colors due to:
A) High thermal conductivity
B) p-orbital transitions
C) d-d electronic transitions
D) s-p orbital hybridization
E) Nuclear fusion
12. Which transition metal is widely used as a catalyst in the hydrogenation of alkenes?
A) Zinc
B) Nickel
C) Silver
D) Iron
E) Copper
13. The green color of some old statues and copper roofs is due to:
A) Oxidation of iron
B) Zinc corrosion
C) Formation of copper carbonate
D) Tarnishing of silver
E) Reaction with mercury
14. Which of the following transition metals is most resistant to corrosion?
A) Iron
B) Chromium
C) Zinc
D) Nickel
E) Manganese
15. Which ion of copper gives a blue-colored solution in water?
A) Cu⁰
B) Cu⁺
C) Cu²⁺
D) Cu³⁺
E) Cu⁻
🔹 Biological, Industrial & Technological Importance
16. Which transition metal is commonly used in rechargeable batteries?
A) Gold
B) Iron
C) Cobalt
D) Zinc
E) Manganese
17. Which transition metal is commonly used in making jewelry due to its resistance to tarnishing?
A) Iron
B) Nickel
C) Silver
D) Platinum
E) Chromium
18. Which transition metal is used in photography and mirrors for its reflectivity?
A) Iron
B) Silver
C) Gold
D) Nickel
E) Zinc
19. Which of the following is used in stainless steel for its anti-corrosive properties?
A) Copper
B) Aluminum
C) Chromium
D) Silver
E) Cobalt
20. Which transition metal is used in blood sugar regulation and is an essential trace element?
A) Chromium
B) Nickel
C) Molybdenum
D) Iron
E) Manganese
- Questions on Metalloids
- Questions on Hydrogen and Alkali Metals
- Questions on Alkaline Earth Metals (Group 2)
Answers and Explanations
1. C – Iron
→ Iron is a classic example of a transition metal, found in the d-block.
2. C – d-block
→ Transition metals are defined as d-block elements.
3. C – They often have multiple oxidation states
→ Transition metals exhibit variable valency due to d-orbital flexibility.
4. B – Mercury
→ Mercury is the only liquid transition metal at room temperature.
5. B – Zinc
→ Zinc has a full d-orbital (3d¹⁰) and does not show typical transition behavior.
6. C – Due to the involvement of d-electrons in bonding
→ The energy gap between 4s and 3d orbitals allows multiple oxidation states.
7. D – Iron
→ Iron is the base metal in steel, often alloyed with carbon and other elements.
8. B – [Ar] 3d⁶
→ Iron loses two 4s electrons first, resulting in [Ar] 3d⁶.
9. C – Formation of complex ions
→ Transition metals form coordination compounds with ligands.
10. D – Iron
→ Iron in hemoglobin binds and transports oxygen in red blood cells.
11. C – d-d electronic transitions
→ Light absorption and electronic transitions within d-orbitals cause coloration.
12. B – Nickel
→ Nickel is a common catalyst for hydrogenation in organic chemistry.
13. C – Formation of copper carbonate
→ Copper reacts with CO₂ and moisture to form green patina (verdigris).
14. B – Chromium
→ Chromium forms a passive oxide layer that resists corrosion.
15. C – Cu²⁺
→ Cu²⁺ ions typically give a blue solution due to d-d transitions.
16. C – Cobalt
→ Used in lithium-ion and other rechargeable batteries.
17. D – Platinum
→ Highly resistant to tarnishing and ideal for high-end jewelry.
18. B – Silver
→ Silver is highly reflective and used in mirrors and photography.
19. C – Chromium
→ Chromium gives stainless steel its corrosion resistance.
20. A – Chromium
→ Chromium plays a role in insulin function and glucose metabolism.
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