Transition Elements and Coordination Chemistry Basics - Applications
Q. In the context of redox reactions, what happens to a transition metal when it acts as a reducing agent?
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A.
It gains electrons.
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B.
It loses electrons.
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C.
It remains unchanged.
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D.
It forms a complex.
Solution
When a transition metal acts as a reducing agent, it loses electrons and is oxidized.
Correct Answer: B — It loses electrons.
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Q. In the context of redox reactions, what happens to the oxidation state of manganese in the reaction MnO4- + 8H+ + 5e- → Mn2+ + 4H2O?
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A.
It increases
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B.
It decreases
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C.
It remains the same
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D.
It fluctuates
Solution
The oxidation state of manganese decreases from +7 in MnO4- to +2 in Mn2+.
Correct Answer: B — It decreases
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Q. What is the coordination number of the complex [Cu(NH3)4]SO4?
Solution
In [Cu(NH3)4]SO4, copper is coordinated to four ammonia ligands, giving it a coordination number of 4.
Correct Answer: B — 4
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Q. Which ligand is considered a strong field ligand according to the spectrochemical series?
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A.
H2O
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B.
Cl-
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C.
CN-
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D.
NH3
Solution
CN- (cyanide) is a strong field ligand that causes large splitting of d-orbitals.
Correct Answer: C — CN-
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Q. Which of the following acids is a strong acid that can be used to dissolve metals?
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A.
HCl
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B.
H2SO4
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C.
HNO3
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D.
All of the above
Solution
All of the listed acids (HCl, H2SO4, HNO3) are strong acids that can effectively dissolve metals.
Correct Answer: D — All of the above
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Q. Which of the following transition metals is known for forming a complex with a coordination number of 6?
Solution
Iron (Fe) commonly forms octahedral complexes with a coordination number of 6.
Correct Answer: A — Fe
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Q. Which of the following transition metals is most commonly used in catalysis?
Solution
Iron (Fe) is widely used as a catalyst in various industrial processes, including the Haber process.
Correct Answer: B — Fe
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