Question

How many of the following are the minerals of aluminium?
Magnesite, cryolite, kaolinite, malachite, epsum salt, bauxite, cuprite

Answer 1

Answer: 3

Cryolite $N{a}_{3}Al{F}_6$, kaolinite $A{l}_{2}O{H}_{4}S{i}_2{O}_5$ and bauxite $A{l}_2{O}_3\cdot 2H_{2}O$ are the minerals of aluminium.
Cryolite ores are the chief ore of aluminium of chemical formula $N{a}_{3}Al{F}_6$. It is also used to give fireworks a yellow color.
Kaolinite is a clay mineral of chemical formula $(A{l}_2{O}_3{)}_{2}SiO\cdot 2H_{2}O$. It is a soft, earthy, usually white, mineral.
Cuprite, soft, heavy, red oxide mineral $(C{u}_{2}O)$ that is an important ore of copper.
Malachite is a copper carbonate hydroxide mineral, with the formula $C{u}_{2}C{O}_3(OH{)}_2$.
This opaque, green-banded mineral crystallizes in the monoclinic crystal system.