alleryAfter ore processing, what name is given to the discarded gangue?
- Mineral concentrate
- Tailings residue
- Flux additive
- Smelting matte
Show answer and solution
Correct answer: B. Tailings residue
Processed gangue is called tailings.
ICSE Class 10 Metallurgy — practice questions — page 2
Explore 68 free Metallurgy questions in ICSE Class 10 Chemistry. Open each question or exercise to read its content, reference answers and available explanation.
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Showing questions 31–60 of 68.
After ore processing, what name is given to the discarded gangue?Read the answer and worked solution →Froth flotation separates minerals by differences in what property?Read the answer and worked solution →In flotation, where do hydrophobic mineral particles move?Read the answer and worked solution →What is skimmed from a flotation cell to collect valuable mineral?Read the answer and worked solution →In froth flotation, what are the non-floating minerals called?Read the answer and worked solution →Roasting heats an ore under a flow of what?Read the answer and worked solution →Roasting is generally applied to which mineral ores?Read the answer and worked solution →What products form when a sulfide ore is roasted in air?Read the answer and worked solution →Which statement distinguishes calcination from melting?Read the answer and worked solution →Calcination commonly uses what oxygen condition?Read the answer and worked solution →Calcining limestone drives off which gas?Read the answer and worked solution →What solid product forms when limestone is calcined?Read the answer and worked solution →Which equation represents limestone calcination?Read the answer and worked solution →In smelting, what is the high-temperature reduction step?Read the answer and worked solution →What is the role of carbon monoxide in iron-oxide reduction?Read the answer and worked solution →How can carbon monoxide form in an air-starved furnace?Read the answer and worked solution →Why is flux added during smelting?Read the answer and worked solution →Which material is commonly used as a smelting flux?Read the answer and worked solution →What is slag in smelting?Read the answer and worked solution →In Ellingham analysis, oxide stability is compared against what variable?Read the answer and worked solution →Which quantity does an Ellingham plot show for oxidation?Read the answer and worked solution →On an Ellingham plot, what does a lower oxide line indicate?Read the answer and worked solution →Which oxide is more stable according to the cited Ellingham comparison?Read the answer and worked solution →Why can aluminium reduce iron oxide in thermite?Read the answer and worked solution →Which limitation applies to Ellingham analysis?Read the answer and worked solution →A thermodynamically favourable reduction may still be slow because of…Read the answer and worked solution →At high temperatures, how can oxide stability change?Read the answer and worked solution →At high temperature, carbon can act as a reducing agent because…Read the answer and worked solution →In the upper blast furnace, which gas reduces haematite?Read the answer and worked solution →Where is the valuable sulfide found in smelting?Read the answer and worked solution →
Worked practice questions
Froth flotation separates minerals by differences in what property?
- Ionic charge
- Fusion temperature
- Atomic number
- Hydrophobicity
Show answer and solution
Correct answer: D. Hydrophobicity
Froth flotation exploits differences in how minerals interact with water.
In flotation, where do hydrophobic mineral particles move?
- They settle to the tank bottom
- They stay dispersed in water
- Air bubbles carry them into froth
- They bind only to tank walls
Show answer and solution
Correct answer: C. Air bubbles carry them into froth
Hydrophobic particles attach to rising air bubbles and collect in the froth.
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