Exams › JEE Advanced › Chemistry
Smithsonite is the American name of a certain ore, while it has a different European name. The metal is extracted from Smithsonite by calcination followed by carbon reduction. What is the European name of Smithsonite?
- Calamine
- Bauxite
- Dolomite
- Sphalerite
Correct answer: Calamine
Solution
Smithsonite (American name) is zinc carbonate (ZnCO3), whose European name is Calamine. It is calcined to ZnO, then reduced with carbon to obtain zinc metal.
Related JEE Advanced Chemistry questions
- Sulfide ores are common for the metals -
- When Cu₂S is heated, which of the following substances produces copper metal?
- Galena, a lead ore, undergoes partial oxidation when air is passed through it at elevated temperatures. Afterward, air flow is stopped, and heating continues in a sealed furnace, allowing self-reduction to occur. What is the mass (in kg) of lead formed per kilogram of oxygen used? (Atomic masses in g/mol: O = 16, S = 32, Pb = 207)
- Identify the chemical compositions of calamine, malachite, magnetite, and cryolite in the correct sequence.
- A mixture of cations is treated with H2S gas in an acidic solution. Which group of cations will form insoluble sulfide precipitates under these conditions?
- Which of the following pairs of metals is correctly matched with its commercial extraction method?
⚔️ Practice JEE Advanced Chemistry free + battle 1v1 →