1(vi)
Assertion (A): Hydraulic washing is a method to separate impurities from the ore.
Reason (R): In Hydraulic washing, denser particles float and lighter particles settle down.
- (a)Both (A) and (R) are true and (R) is the correct explanation of (A).
- (b)Both (A) and (R) are true and (R) is not the correct explanation of (A).
- (c)(A) is true but (R) is false.
- (d)(A) is false but (R) is true.
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(A) is true but (R) is false.
Reason — Hydraulic washing (gravity separation) is a method to separate impurities (gangue) from the ore. Hence, the assertion (A) is true.
During the hydraulic washing, denser particles settle at the bottom whereas lighter particles float on the surface. Hence, the reason (R) is false.