A. Cannot be produced from it B. Can be produced from it C. Can be extracted from it profitable D. Is very costly
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A. Silica B. Sodium chloride C. Limestone D. Sodium carbonate
A. Uric acid B. Urea C. Ammonia D. Amino acid
A. Iron B. Aluminium C.calcium D. Sodium
A. Froth floatation B. Roasting C. Electrolysis D. Bessemerisation
A. Cathode B. Anode C. Both D. None
A. Flux B. Slag C. A reducing agent D. An oxidising agent
A. Atomophil B. Lithophil C. Calcophil D. Sidrophil