Extraction of Metals - Result Question 56
57. Match the extraction processes listed in Column I with metals listed in Column II.
$(2006,6$ M)
| Column I | Column II | ||
|---|---|---|---|
| A. | Self-reduction | p. | Lead |
| B. | Carbon reduction | q. | Silver |
| C. | Complex formation and displacement by metal |
r. | Copper |
| D. | Decomposition of iodide | s. | Boron |
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Answer:
Correct Answer: 57. $ A \rightarrow p,r; B \rightarrow p; C \rightarrow q; D \rightarrow s $
Solution:
| Extraction methods |
Metals extracted |
||
|---|---|---|---|
| A. | Self reduction | r. | Copper, (P) Lead |
| B. | Carbon reduction | p. | Lead |
| C. | Complex formation and displacement by metal |
q. | Silver : $Ag _2 S+NaCN$ $\longrightarrow Na\left[Ag(CN) _2\right]$ $Na\left[Ag(CN) _2\right]+Zn$ $\longrightarrow Na _2\left[Zn(CN) _4\right]$ $+Ag$ |
| D. | Decomposition of iodide |
s. | Boron : $BI _3 \stackrel{\Delta}{\longrightarrow} B+\frac{3}{2} I _2$ |
BETA
