Extraction of Metals from Ores
Chemistry ⇒ Metals and Non-metals
Extraction of Metals from Ores starts at 9 and continues till grade 12.
QuestionsToday has an evolving set of questions to continuously challenge students so that their knowledge grows in Extraction of Metals from Ores.
How you perform is determined by your score and the time you take.
When you play a quiz, your answers are evaluated in concept instead of actual words and definitions used.
See sample questions for grade 10
Describe the process of froth flotation used in the concentration of sulphide ores.
Describe the process of leaching in the extraction of metals.
Describe the role of limestone in the extraction of iron from its ore.
Explain why carbon cannot be used to reduce aluminium oxide to aluminium.
Explain why gold and platinum are found in the native state.
Explain why iron is not extracted by electrolysis of its ore.
Explain why sulphide ores are usually converted to oxides before reduction.
Name one metal that is found in nature in the free state.
Which of the following is a gangue material?
(1) Silica
(2) Iron
(3) Copper
(4) Zinc
Which of the following is a sulphide ore?
(1) Bauxite
(2) Galena
(3) Hematite
(4) Magnetite
Which of the following is NOT a method of concentration of ores?
(1) Froth flotation
(2) Magnetic separation
(3) Electrolysis
(4) Hydraulic washing
Which of the following is the correct order of steps in the extraction of a metal from its ore?
(1) Concentration → Reduction → Refining
(2) Reduction → Concentration → Refining
(3) Refining → Concentration → Reduction
(4) Concentration → Refining → Reduction
Fill in the blank: The chemical formula of bauxite is __________.
Fill in the blank: The ore of mercury is __________.
Fill in the blank: The process of heating an ore strongly in excess of air is called __________.
Fill in the blank: The process of removing gangue from ore is called __________.
State whether the following statement is true or false: "Leaching is used to extract aluminium from bauxite."
State whether the following statement is true or false: "Metals at the top of the reactivity series are found in nature in free state."
State whether the following statement is true or false: "Roasting is done in the presence of air."
True or False: Electrolytic refining is used to obtain metals of very high purity.
