1)

 Which of the following methods is used to separate wolframite and stannic oxide present in cassiterite?


A) Hydraulic washing using Wilfley table

B) Froth flotation

C) Hydraulic classifier

D) Magnetic separation

Answer:

Option D

Explanation:

 Magnetic separation is used to separate wolframite and stannic oxide present in cassiterite. This method is based upon the difference in the magnetic properties of the ore components. In this process, either ore or gangue is magnetic in nature.