Q.

(A) Levigation is used for the separation of oxide ores from impurities
(R) Ore particles are washed away in a current of water.

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a

Both (A) and (R) are true but (R) is not the correct explanation of (A)

b

Both (A) and (R) are true and (R) is the correct explanation of (A)

c

Both (A) and (R) are false

d

(A) is true but (R) is false

answer is C.

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Detailed Solution

  • Gangue particles are lighter than ore particles; In such case, the powdered impure ore is washed with upward stream of water. 
  • So that lighter impurities get washed away.
  •  This method is Levigation (or) hydraulic washing (or) gravity process. 
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