Expert Chemistry Tutoring

Q1. Knowledge Recall (1-2 marks)

State the difference between an ore and a mineral. (2 marks)

Q2. Application (2-3 marks)

Explain why roasting is an important step in the extraction of copper from copper ore. (3 marks)

Q3. Knowledge Recall (1-2 marks)

Name the reducing agent used in the blast furnace to extract iron from iron ore. (1 mark)

Q4. Application (2-3 marks)

Describe the role of limestone in the blast furnace extraction of iron. (3 marks)

Q5. Chemical Equations (3-4 marks)

Balance the following equation for the extraction of copper from copper oxide using carbon monoxide:

Q6. Calculations (3-4 marks)

An ore contains 20% copper by mass. Calculate the mass of copper that can be extracted from 500 kg of the ore. (3 marks)

Q7. Knowledge Recall (1-2 marks)

State the name of the process used to purify copper by removing impurities. (1 mark)

Q8. Application (2-3 marks)

Explain why aluminum is extracted by electrolysis rather than chemical reduction. (3 marks)

Q9. Knowledge Recall (1-2 marks)

Name the solvent used in the Bayer process for extracting aluminum from bauxite. (1 mark)

Q10. Chemical Equation (3-4 marks)

Write a chemical equation for the reaction that occurs in the electrolysis cell during the extraction of aluminum from aluminum oxide. (3 marks)