Question

The correct set of carbonate ores is (i) dolomite (ii) anglesite (iii) cuprite (iv) malachite (v) argentite (vi) siderite

Answer 1

Carbonate ores:

• A carbonate is a carbonic acid salt (${\mathrm{H}}_2{\mathrm{CO}}_3$).
• Carbonate minerals are abundant and diverse in chemically precipitated sedimentary rock. Carbonates are mildly acidic bases.
• Calcite, or Calcium Carbonate, ${\mathrm{CaCO}}_3$, is the major ingredient of limestone (as well as mollusc shells and coral skeletons); Dolomite, is a Calcium-Magnesium Carbonate $\mathrm{CaMg}{\left({\mathrm{CO}}_3\right)}_2$.
• Malachite is $\mathrm{Cu}{\left(\mathrm{OH}\right)}_2.{\mathrm{CuCO}}_3$. It is carbonate ore.
• Siderite is ${\mathrm{FeCO}}_3$, an Iron ore.

Thus, (iv) Malachite and (vi) Siderite are carbonate ores.