Chemistry - Metallurgy Question with Solution | TestHub

1. Zinc blende (ZnS) and Galena (PbS) can be separated by differential froth flotation by adjusting the oil–water ratio and using suitable reagents. Hence, (A) is correct.

2. Cassiterite (SnO₂) is concentrated by magnetic separation from magnetic wolframite. Hence, (B) is correct.

3. Siderite (FeCO₃) and Calamine (ZnCO₃) are both carbonate ores. Hence, (C) is correct.

4. In leaching of argentite, oxygen oxidizes cyanide, not the metal, so (D) is incorrect.

Correct Answer: (A), (B) and (C)