Quiz for Metallurgy

Q1: Which of the following metals is extracted using electrolytic reduction?

A. Aluminium B. Iron C. Copper D. Zinc

Q2: Froth flotation process is used for the concentration of:

A. Oxide ores B. Carbonate ores C. Sulphide ores D. Halide ores

Q3: The function of limestone in the extraction of iron is:

A. Reducing agent B. Flux to remove impurities C. Oxidising agent D. To react with iron

Q4: Which of the following is not a method for the concentration of ore?

A. Magnetic separation B. Electrolysis C. Leaching D. Froth flotation

Q5: In the extraction of zinc, zinc oxide is reduced to zinc using:

A. Carbon B. Hydrogen C. Coke D. Zinc sulphide

Q6: Roasting involves heating the ore in the presence of:

A. Oxygen B. Carbon C. Hydrogen D. Sulphur

Q7: Which metal is refined using Mond’s process?

A. Iron B. Nickel C. Zinc D. Copper

Q8: Calcination is used to remove:

A. Sulphur B. Water of hydration C. Carbon dioxide D. All of these

Q9: The slag obtained during the extraction of iron is:

A. FeSiO₃ B. CaSiO₃ C. CaCO₃ D. Fe₂O₃

Q10: Alumina is dissolved in cryolite to:

A. Lower the melting point of alumina B. Increase conductivity C. Remove impurities D. Increase melting point

Q11: Which process is used for leaching bauxite?

A. Cyanide process B. Electrolysis C. Baeyer’s process D. Froth flotation

Q12: Zone refining is used for:

A. Purification of iron B. Extraction of zinc C. Purification of semiconductors D. Extraction of copper

Q13: The metal that can be obtained by electrolytic reduction of molten ore is:

A. Aluminium B. Iron C. Copper D. Silver

Q14: Which of the following statements is correct?

A. Roasting is done for carbonate ores B. Calcination is done for sulphide ores C. Roasting converts sulphide to oxide D. Calcination involves heating in presence of air

Q15: The purpose of adding cryolite in the electrolytic reduction of alumina is:

A. To act as a reducing agent B. To increase electrical conductivity C. To act as a flux D. To increase melting point

Q16: In electrolytic refining of copper, impure copper is:

A. Anode B. Cathode C. Electrolyte D. Removed

Q17: What is the chemical formula of slag formed in the blast furnace?

A. Fe₂O₃ B. CaSiO₃ C. FeSiO₃ D. SiO₂

Q18: Blister copper contains about:

A. 90% copper B. 95% copper C. 98% copper D. 100% copper

Q19: Which method is used to extract highly reactive metals?

A. Electrolysis B. Roasting C. Reduction with carbon D. Leaching

Q20: Van Arkel process is used to purify:

A. Copper B. Zirconium C. Iron D. Silver