A. Calcination B. Fluxing C. Smelting D. Roasting
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A. C B. Al C. H D. Electric current
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A. Pure copper B. 98 ℅ copper C. Ore of copper D. Alloy of copper
A. Flux B. Slag C. Gangue D. None
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A. Absorption B. Absorption C. Coagulation D. Sedimentation
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A. Neutralisation B. Electrolysis C. Distillation D. Electroplating
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A. Hydration B. Dehydration C. Deliquescence D. None of these
A. Different atomic numbers B. Same atomic numbers C. Sometimes different sometimes same atomic numbers D. Very high actual masses