General Principles And Processes Of Isolation Of Elements Ques 18
18. Match items of Column I with the items of Column II and asign the correct code :
[2016]
| Column-I | Column-II | |
|---|---|---|
| (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 $Ni$ |
Code :
$\quad$ $\quad$ (A) $\quad$ (B) $\quad$ (C) $\quad$ (D)
(a) $\quad$ (iv) $\quad$ (ii) $\quad$ (iii) $\quad$ (i)
(b) $\quad$ (ii) $\quad$ (iii) $\quad$ (i) $\quad$ (v)
(c) $\quad$ (i) $\quad$ (ii) $\quad$ (iii) $\quad$ (iv)
(d) $\quad$ (iii) $\quad$ (iv) $\quad$ (v) $\quad$ (i)
Show Answer
Answer:
Correct Answer: 18.(a)
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.
BETA
