####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 $Pb$
| Element | Ores | Name |
|---|---|---|
| $Ag$ | $Ag _2 S$ | Argentite |
| $Cu$ | $CuFeS _2$ | Copper pyrites |
| $Pb$ | $PbS$ | Galena |
| $Sn$ | $SnO _2$ | Cassiterite |
| $Mg$ | $MgCO _3 \cdot CaCO _3$ | Dolomite |
| $Al$ | $Al _2 O _3 \cdot x H _2 O$ | Bauxite |
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