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Q. The ore containing silver is:

BHUBHU 2002

Solution:

Galena is ore of lead. It is chemically $PbS$.
It contains very small amount of silver as impurity.
Dolomite is ore of $Ca$ and $Mg \left( CaCO _{3} \cdot MgCO _{3}\right)$
Magnetite is ore of iron $Fe _{3} O _{4}$.
Limonite is $Fe _{2} O _{3} \cdot 3 H _{2} O$