Question

write the names and formula of two ores of aluminium ​

Answer 1

a). Ore of aluminium (Al) is : Bauxite: it is a mixture of iron oxide, silicon oxide, titanium oxide and aluminium oxide as 

Al2O3 + SiO2 + TiO2 + Fe2O3  

Cryolite : Na3AlF6  

b). Copper (Cu) : Copper Pyrite : CuFeS2

Malachite : CuCO3Cu(OH)3 

Answer 2

BAUXITE — Al₂O₃.2H₂O

2)DIASPORE— Al₂O₃.H₂O