Extraction of Metals - Result Question 59
60. Match the following metals listed in Column I with extraction processes listed in Column II.
$(1979,2 M)$
| Column I | Column II | ||
|---|---|---|---|
| A. | Silver | p. | Fused salt electrolysis |
| B. | Calcium | q. | Carbon reduction |
| C. | Zinc | r. | Carbon monoxide reduction |
| D. | Iron | s. | Amalgamation |
| E. | Copper | t. | Self-reduction |
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Answer:
Correct Answer: 60. $ A \rightarrow s; B \rightarrow p; C \rightarrow q; D \rightarrow q,r; E \rightarrow t $
Solution:
- A. Silver is extracted by amalgamation process
$ Ag+Hg \longrightarrow \underset{\text { Amalgam }}{\operatorname{Ag}(Hg)} \xrightarrow{\text { Distillation }} \operatorname{Ag}(s)+\operatorname{Hg}(v) \uparrow $
B. Calcium is extracted by electrolysis of fused $CaCl _2$.
C. Zinc is extracted by carbon reduction method
$ ZnO+C \longrightarrow Zn+CO $
D. Iron is extracted by both carbon reduction method and $CO$ reduction methods
$ \begin{aligned} Fe _2 O _3+3 C & \longrightarrow 2 Fe+3 CO \\ Fe _2 O _3+3 CO & \longrightarrow 2 Fe+3 CO _2 \end{aligned} $
E. Copper is extracted by self reduction methods
$ \begin{aligned} Cu _2 S+O _2 & \longrightarrow Cu _2 O+SO _2 \\ Cu _2 O+Cu _2 S & \longrightarrow Cu+SO _2 \end{aligned} $
BETA
