Chemical Formulas of Calamine Malachite Magnetite and Cryolite

To determine the correct chemical formulas corresponding to each mineral, we recall their chemical compositions:

1. Calamine: It is an ore of zinc primarily composed of zinc carbonate. $\text{Chemical Formula: } \text{ZnCO}_3$

2. Malachite: It is a basic copper carbonate mineral. $\text{Chemical Formula: } \text{CuCO}_3 \cdot \text{Cu}(\text{OH})_2$

3. Magnetite: It is a magnetic iron oxide mineral containing both iron(II) and iron(III) oxidation states (mixed oxide of iron). $\text{Chemical Formula: } \text{Fe}_3\text{O}_4$

4. Cryolite: It is a compound mineral of sodium, aluminium, and fluorine, used in the metallurgy of aluminium. $\text{Chemical Formula: } \text{Na}_3\text{AlF}_6$

Matching these formulas respectively gives: $\text{Calamine} \longrightarrow \text{ZnCO}_3$ $\text{Malachite} \longrightarrow \text{CuCO}_3 \cdot \text{Cu}(\text{OH})_2$ $\text{Magnetite} \longrightarrow \text{Fe}_3\text{O}_4$ $\text{Cryolite} \longrightarrow \text{Na}_3\text{AlF}_6$

This sequence matches option (C).

Correct Option: (C)