7. The method of concentrating the ore which makes use of the difference in density between ore and impurities is called A.liquation B.leaching C.levigation D.magnetic separation
Answer: Option C Solution: Levigation is based on the difference in densities of the metallic ore and gangue particles. Powdered ore is treated with a stream of running water when the lighter gangue particles are washed away and heavier ore particles are left behind.
