Baeyer's process is used to concentrate bauxite ore to alumina. Give balanced chemical equations for the reaction taking place for it's conversion from bauxite to alumina.

Fill in the blank from the choices given in bracket: An alloy used to make statues is ………….. [bronze,brass,fuse metal]

Differentiate between the following pairs based on the information given in the bracket.

Cations and anions [formation from an atom]

Give one word or a phrase for the statement : The substance prepared by adding other metals to a base metal in appropriate proportions to obtain certain desirable properties.