Give the formula of Bauxite.

Give the formulae of Borax .

Give the formula of borazine . What is its common name ?

Give the formulae of (a)Borax , (b)Colemanite

Give the formulae of Colemanite.

Classify the following ores as oxides, sulphides, chlorides, carbonates and sulphates and write their formulae. Bauxite, Copper Iron Pyrites, Zine Blende, Magnesite, Epsom salt, Horn Silver, Pyrolusite, Haematite, Zincite, Rock salt, Cinnabar, Magnetite, Galena, Gypsum, Limestone, Carnallite.

What is an amphoteric oxide? Give the formula of an amphoteric oxide formed by an element of group-13.

What is an amphoteric oxide? Give the formula of an amphoteric oxide formed by a element of group - 13.