EXTRACTION OF METALS METALS AND NON-METALS 03 Class 10th Chemistry (Practice Sheet) 1 What is the process of removing impurities or gangue from ore called? A. Calcination B. Smelting C. Enrichment D. Electrolysis 2 Which method is used for extracting metals low in the reactivity series without an external reducing agent? A. Calcination B. Roasting C. Self-reduction D. Aluminothermic reaction 3 What is the primary purpose of calcination in the extraction of metals? A. Reduction of metal oxides B. Removal of impurities C. Decomposition of carbonate ores D. Electrolytic reduction 4 In the extraction of metals in the middle of the reactivity series, what is the role of smelting? A. Decomposition of carbonate ores B. Heating ore in the absence of air C. Obtaining crude metal in its molten state D. Electrolytic reduction 5 How are metals at the top of the reactivity series typically extracted? A. Roasting B. Electrolytic reduction C. Smelting D. Aluminothermic reaction 6 Explain the process of calcination and its significance in the extraction of metals. 7 Differentiate between roasting and smelting in the extraction of metals. 8 Why is electrolytic reduction used for metals at the top of the reactivity series? 9 Describe the Hall's process for the extraction of metals. 10 How does electrolytic refining work, and what is the role of the cathode in this process? Page 1 Email: Phone No: Website:
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