Transition Elements and Coordination Chemistry Basics - Real World Applications
Q. In redox reactions, what happens to the oxidation state of a transition metal when it acts as a reducing agent?
A.It increases
B.It decreases
C.It remains the same
D.It becomes zero
Solution
When a transition metal acts as a reducing agent, it donates electrons, resulting in a decrease in its oxidation state.
Correct Answer: B — It decreases
Q. What is the coordination number of the metal ion in the complex [Co(NH3)6]Cl3?
A.2
B.4
C.6
D.8
Solution
The coordination number of the metal ion in [Co(NH3)6]Cl3 is 6, as it is surrounded by six ammonia ligands.
Correct Answer: C — 6
Q. What type of bond is primarily formed between a transition metal and a ligand in coordination complexes?
A.Ionic bond
B.Covalent bond
C.Metallic bond
D.Coordinate covalent bond
Solution
In coordination complexes, the bond formed between a transition metal and a ligand is primarily a coordinate covalent bond, where the ligand donates a pair of electrons.
Correct Answer: D — Coordinate covalent bond
Q. Which of the following ligands is considered a strong field ligand?
A.Iodide
B.Water
C.Cyanide
D.Chloride
Solution
Cyanide (CN-) is a strong field ligand that causes greater splitting of d-orbitals in transition metal complexes.
Correct Answer: C — Cyanide
Q. Which of the following transition metals is commonly used as a catalyst in the Haber process for ammonia synthesis?
A.Iron
B.Copper
C.Nickel
D.Cobalt
Solution
Iron is used as a catalyst in the Haber process to synthesize ammonia from nitrogen and hydrogen.
Correct Answer: A — Iron
Q. Which of the following transition metals is most commonly associated with the formation of colored compounds?
A.Calcium
B.Sodium
C.Iron
D.Barium
Solution
Iron is a transition metal that is commonly associated with the formation of colored compounds due to its variable oxidation states.
Correct Answer: C — Iron
Q. Which transition metal is known for its ability to form complex ions with a variety of ligands and is used in biological systems?
A.Zinc
B.Iron
C.Copper
D.Manganese
Solution
Copper is known for its ability to form complex ions and plays a crucial role in biological systems, such as in hemocyanin.
