Question

$\begin{array}{cc}\text{Column I}& \text{Column II}\\ \text{(A) Cyanide process}& \text{(P) Ultrapure}Ge\\ \text{(B) Floatation process}& \text{(Q) Dressing of}HgS\\ \text{(C) Electrolytic reduction}& \text{(R) Extraction of}Al\\ \text{(D) Zone refining}& \text{(S) Extraction of}Au\end{array}$

• A. A - S; B - Q; C - R; D - P
• B. A - R; B - S; C - Q; D - P
• C. A - S; B - P; C - Q; D - R
• D. A - S; B - R; C - Q; D - P

Answer 1

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 $Ge$.