Give uses of $Al$ and its compound.
Aluminium is a bright silvery-white metal, with high tensile strength. It has a high electrical and thermal conductivity. On a weight-to-weight basis, the electrical conductivity of aluminium is twice that of copper.
Aluminium is used extensively in industry and everyday life. It forms alloys with $\mathrm{Cu}, \mathrm{Mn}, \mathrm{Mg}$, Si and $\mathrm{Zn}$. Aluminium and its alloys can be given shapes of pipe, tubes, rods, wires, plates or foils and therefore, find uses in packing, utensil making, construction, aeroplane and transportation industry.
The use of aluminium and its compounds for domestic purposes is now reduced considerably because of their toxic nature.
In electrolysis of aluminium oxide which of the following is added to accelerate the process
In the Hoope's process for refining of aluminium, the fused materials form three different layers and they remain separated during electrolysis also. This is because
In the purification of bauxite by Hall's process
Boric acid is an acid because its molecule
In which of the following reaction, the hybridisation of the central atom changes from $sp^2$ to $sp^3$ ?