General Principles of Metallurgy - Applications
Q. In the extraction of iron, what is the role of limestone?
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A.
To act as a reducing agent
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B.
To remove sulfur
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C.
To form slag
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D.
To increase temperature
Solution
Limestone is added to form slag, which helps remove impurities during the extraction of iron.
Correct Answer: C — To form slag
Q. What is the main advantage of using bioleaching in metallurgy?
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A.
Higher yield of metals
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B.
Lower energy consumption
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C.
Faster extraction rates
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D.
Less environmental impact
Solution
Bioleaching uses microorganisms to extract metals, resulting in less environmental impact compared to traditional methods.
Correct Answer: D — Less environmental impact
Q. What is the primary function of flux in metallurgy?
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A.
To increase temperature
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B.
To facilitate reduction
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C.
To remove impurities
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D.
To enhance conductivity
Solution
Flux is used to remove impurities from metal ores during the smelting process.
Correct Answer: C — To remove impurities
Q. What is the primary purpose of the blast furnace in metallurgy?
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A.
To purify metals
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B.
To reduce metal ores
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C.
To melt metals
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D.
To alloy metals
Solution
The blast furnace is primarily used to reduce iron ore into molten iron.
Correct Answer: B — To reduce metal ores
Q. Which of the following elements is most likely to form a coordination compound with a transition metal?
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A.
Sodium
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B.
Chlorine
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C.
Water
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D.
Oxygen
Solution
Water is a common ligand that can form coordination compounds with transition metals.
Correct Answer: C — Water
Q. Which of the following is a characteristic of a good reducing agent in metallurgy?
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A.
High electronegativity
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B.
Low ionization energy
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C.
High oxidation potential
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D.
Low reactivity
Solution
A good reducing agent should have low ionization energy, allowing it to easily donate electrons.
Correct Answer: B — Low ionization energy
Q. Which of the following is NOT a method of extracting metals from their ores?
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A.
Electrolysis
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B.
Roasting
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C.
Calcination
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D.
Sublimation
Solution
Sublimation is not a method used for extracting metals; it is a phase transition from solid to gas.
Correct Answer: D — Sublimation
Q. Which of the following metals is typically obtained from its ore using the hydrometallurgical process?
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A.
Gold
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B.
Iron
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C.
Lead
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D.
Nickel
Solution
Gold is often extracted using hydrometallurgical methods such as cyanidation.
Correct Answer: A — Gold
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