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  4. In a process of concentration of ore, an upward stream of running water is used to wash the powdered ore. The lighter gangue particles are washed away and the heavier ores are left behind. Which method of concentration of ore is discussed in the above passage?

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Q. In a process of concentration of ore, an upward stream of running water is used to wash the powdered ore. The lighter gangue particles are washed away and the heavier ores are left behind. Which method of concentration of ore is discussed in the above passage?

General Principles and Processes of Isolation of Elements

Solution:

Correct answer is (a) Hydraulic washing