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.

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

Cations and anions [formation from an atom]

State how the physical and chemical property differences between metals and non-metals are related to their basic atomic structure.

Define a metal with particular emphasis on :

(i) ionization

(ii) valency

(iii) formation of oxides.

State the position [group] in the periodic table to which the following metals belong :

(i) Na – alkali metal

(ii) Mg – alkaline earth metal

(iii) Fe and Zn transition elements

(iv) inner transition elements (metals)

(v) Al – post transition element.

Metals occur in the free state and in the combined state. Name two metals which occur in the free or native state. In the combined state metals occur in the form of compounds. Name two different metallic compounds in each case which occur as (i) halides (ii) oxides (iii) sulphides