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Question

Column IColumn II(A) Cyanide process(P) Ultrapure Ge(B) Floatation process(Q) Dressing of HgS(C) Electrolytic reduction(R) Extraction of Al(D) Zone refining(S) Extraction of Au
  1. A - S; B - Q; C - R; D - P
  2. A - R; B - S; C - Q; D - P
  3. A - S; B - P; C - Q; D - R
  4. A - S; B - R; C - Q; D - P


Solution

The correct option is A A - S; B - Q; C - R; D - P
(a) Cyanide process is used in the extraction of Au and Ag.

(b) Froth flotation process is used for dressing HgS. This process is used for sulphide ores. 

(c) Electrolytic reduction is used in the extraction of Al.

(d) Zone refining is used to obtain ultrapure Ge.

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