Select the correct statements. I. Oxide ores of heavy metals are concentrated by hydraulic washing. II. Froth floatation process is used for the concentration of magnetic ores. III. Oxides of highly reactive metals can be reduced to metals by the action of heat alone. IV. Carbonate ores are decomposed to form metal oxides by heating in the absence of air.

Question

MCQ (Single)Enrichment of OresCalcination of Carbonate Ores

Similar Questions

Identify the product 'X' obtained in the following chemical reaction : CaCO₃ —Δ→ 'X' + CO₂

MCQ (Single)Thermal Decomposition ReactionCalcination of Carbonate Ores

Assertion (A) : Metals in the middle of activity series are found in nature as sulphides or carbonates. Reason (R) : The sulphide ores are calcinated whereas carbonate ores are roasted to extract metals from them.

Assertion-Reason

Extraction of Metals in Middle of Activity Series