General Principles and Processes of Isolation of Elements - Result Question 9
####9. Match items of Column I with the items of Column II and asign the correct code : [2016]
\begin{tabular}{ll} \hline \multicolumn{1}{c}{ Column-I } & \multicolumn{1}{l}{ Column-II } \\ \hline (A) Cyanide process & (i) Ultrapure Ge \\ (B) Froth flotation & (ii) Dressing of ZnS \\ process & \\ (C) Electrolytic & (iii) Extraction of Al \\ reduction & \\ (D) Zone refining & (iv) Extraction of Au \\ & (v) Purification of Ni \\ \hline \end{tabular}
Code :
\begin{tabular}{lllll} & (A) & (B) & (C) & (D) \\
(a) & (iv) & (ii) & (iii) & (i) \\
(b) & (ii) & (iii) & (i) & (v) \\
(c) & (i) & (ii) & (iii) & (iv) \\
(d) & (iii) & (iv) & (v) & (i) \end{tabular}
Show Answer
Solution:
- (a) Highly electropositive metals like $Al, K, Na$ etc. are extracted by the electrolytic reduction.
- zone refining method is used for obtaining metals of high purity e.g. Ge.
- Froth flotation process is suitable for sulphide ores.
- Cyanide process is used for the extraction of gold.
