Question

Cassiterite is concentrated by to remove lighter impurites followed by to remove minerals like wolframite.

• A. levigation
• B. magnetic separation
• C. leaching
• D. froth flotation

Answer 1

Answer: (A), (B)

The correct options are
A levigation
B magnetic separation

Cassiterite is an ore of tin $\left(Sn{O}_2\right)$. It is generally concentrated by levigation to get rid of lighter impurities.

Also, wolframite $(Fe,Mn)W{O}_4$ deposits are often found with cassiterite. These are magnetic and hence are removed by magnetic separation.