Transition Elements and Coordination Chemistry Basics
Q. In the context of redox reactions, which transition metal is commonly used as a reducing agent?
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A.
Manganese
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B.
Iron
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C.
Copper
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D.
Silver
Solution
Iron is commonly used as a reducing agent in various redox reactions.
Correct Answer: B — Iron
Q. What is the coordination number of the central metal ion in the complex [Cu(NH3)4]SO4?
Solution
The coordination number of copper in [Cu(NH3)4]SO4 is 4, as it is surrounded by four ammonia ligands.
Correct Answer: B — 4
Q. What is the oxidation state of chromium in the complex [Cr(NH3)6]Cl3?
Solution
In [Cr(NH3)6]Cl3, the ammonia ligands are neutral, so the oxidation state of chromium is +3.
Correct Answer: B — +3
Q. What type of isomerism is exhibited by the complex [Co(NH3)4Cl2]Cl?
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A.
Geometric
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B.
Optical
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C.
Linkage
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D.
Coordination
Solution
The complex [Co(NH3)4Cl2]Cl exhibits geometric isomerism due to the arrangement of ligands.
Correct Answer: A — Geometric
Q. Which of the following is a characteristic of a coordination compound?
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A.
It contains only ionic bonds.
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B.
It has a central metal atom bonded to ligands.
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C.
It cannot conduct electricity.
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D.
It is always a solid.
Solution
A coordination compound has a central metal atom bonded to one or more ligands.
Correct Answer: B — It has a central metal atom bonded to ligands.
Q. Which of the following statements about transition metals is true?
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A.
They have completely filled d-orbitals.
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B.
They can form colored compounds.
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C.
They do not form complexes.
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D.
They have low melting points.
Solution
Transition metals can form colored compounds due to d-d electronic transitions.
Correct Answer: B — They can form colored compounds.
Q. Which of the following transition metals has the highest melting point?
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A.
Iron
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B.
Tungsten
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C.
Nickel
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D.
Copper
Solution
Tungsten has the highest melting point among transition metals, at 3422 °C.
Correct Answer: B — Tungsten
Q. Which of the following transition metals is known for its ability to form stable complexes with ligands?
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A.
Zinc
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B.
Copper
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C.
Iron
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D.
Nickel
Solution
Nickel is known for its ability to form stable complexes with various ligands.
Correct Answer: D — Nickel
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