Extraction of Metals - Result Question 22
22. Sulphide ores are common for the metals
(2013 Adv.)
(a) $Ag, Cu$ and $Pb$
(b) $Ag, Cu$ and $Sn$
(c) $Ag, Mg$ and $Pb$
(d) $Al, Cu$ and $Pb$
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Answer:
Correct Answer: 22. (a)
Solution:
<table>
<thead>
<tr>
<th>Element</th>
<th>Ores</th>
<th>Name</th>
</tr>
</thead>
<tbody>
<tr>
<td>$Ag$</td>
<td>$Ag _2 S$</td>
<td>Argentite </td>
</tr>
<tr>
<td>$Cu$ </td>
<td>$CuFeS _2$</td>
<td>Copper pyrites</td>
</tr>
<tr>
<td>$Pb$</td>
<td>$PbS$</td>
<td>Galena </td>
</tr>
<tr>
<td>$Sn$ </td>
<td>$SnO _2$ </td>
<td>Cassiterite </td>
</tr>
<tr>
<td>$Mg$ </td>
<td>$MgCO _3 \cdot CaCO _3$ </td>
<td>Dolomite </td>
</tr>
<tr>
<td>$Al$ </td>
<td>$Al _2 O _3 \cdot x H _2 O$ </td>
<td>Bauxite </td>
</tr>
</tbody>
</table>