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Froth floatation is used for | |
A. | washing fine coal dust (< 0.5 mm size). [Correct Answer] |
B. | washing lump coal (> 80 mm size). [Wrong Answer] |
C. | removing ash from the coal based on difference in specific gravity of coal and ash. [Wrong Answer] |
D. | all (a), (b)and(c). [Wrong Answer] |