"Tenis are coated with a thin layer of aluminium hydroxide." Why?

Define Action of heat on aluminium hydroxide.

How to prepare positive aluminium hydroxide sol?

Answer the following question related with the isolation of aluminium from bauxite: The aluminium oxide for the electrolytic extraction of aluminium is obtained by heating aluminium hydroxide. Write the equation for this reaction.

Aluminium is extracted from bauxite by the electrolysis of aluminium oxide dissolved in cryolite. Now answer the following question: Write the equation for the action of heat on aluminium hydroxide.

Answer the following questions with respect to the electrolytic process in the extraction of aluminium: For the substance listed below explain the role played in the extraction of aluminium. Sodium hydroxide

Why are cimetidine and ranitidine better antacids than sodium hydrogencarbonate or magnesium or aluminium hydroxide ?

Iron is protected by coating it with a thin layer of:

A thick glass slab (mu= 1.5) is to be viewed in reflected white light. It is proposed to coat the slab with a thin layer of a material having refractive index 1.3 so that the wavelength 6000 Å os suppressed. Find the minimum thickness of the coating required.

Aluminium is extracted from bauxite by the electrolysis of aluminium oxide dissolved in cryolite. Now answer the following question: When bauxite is treated with sodium hydroxide solution, what happens to the aluminium oxide and iron (III) oxide?

A glass of refractive index 1.5 is coated with a thin layer of thickness t and refractive index 1.8 . Light of wavelength lambda travelling in air is incident normally on the layer. It is partly reflected at the upper and the lower surfaces of the layer. It is partly reflected at the upper and the lower surfaces of the layer ant the two reflected rays interface . If lambda = 648 nm , obtain the least value of t ("in" 10^(-8)m ) which the rays interface constructively.