Transition Elements and Coordination Chemistry Basics - Competitive Exam Level
Q. In redox reactions, what happens to the oxidation state of the reducing agent?
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A.
Increases
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B.
Decreases
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C.
Remains the same
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D.
Becomes zero
Solution
The oxidation state of the reducing agent decreases as it donates electrons.
Correct Answer: B — Decreases
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Q. What is the coordination number of the complex ion [Cu(NH3)4]2+?
Solution
The coordination number of [Cu(NH3)4]2+ is 4, as it has four ammonia ligands.
Correct Answer: B — 4
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Q. What is the primary reason for the formation of coordination compounds?
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A.
High electronegativity
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B.
Availability of d-orbitals
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C.
Low ionization energy
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D.
High atomic radius
Solution
The availability of d-orbitals allows transition metals to form coordination compounds.
Correct Answer: B — Availability of d-orbitals
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Q. What type of isomerism is shown by [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
This complex exhibits geometric isomerism due to the different arrangements of ligands.
Correct Answer: A — Geometric
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