Which of the following is not a mineral of sulphur?

Assertion: Pure iron is not used for making tools and machines.
Reason: Pure iron is hard.

The molecular formula of cryolite is .....

Match the following List-$I$ (Name of the mineral) with List-$II$ (Type):
| List-$I$ | List-$II$ |
| :--- | :--- |
| $A$. Calamine | $I$. Sulphide |
| $B$. Bauxite | $II$. Halide |
| $C$. Kaolinite | $III$. Carbonate |
| $D$. Cryolite | $IV$. Oxide |
| | $V$. Silicate |

What is the chemical formula of Ruby Silver?

Find the incorrectly matched pair?

Column-$I$ (Ores)	Column-$II$ (Metals)
$A$. Sylvine	Potassium
$B$. Malachite	Magnesium
$C$. Cinnabar	Mercury
$D$. Fluorite (Fluorspar)	Calcium