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Introduction to p Block Elements

Clay, cryolit...

Question

Clay, cryolite, and bauxite are the minerals of aluminium.
Which among them is the ore of aluminum? What is its chemical formula?

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Solution

Among the given minerals of aluminium, Bauxite is the ore of aluminium.
Formula of bauxite is $A l_{2} O_{3} .2 H_{2} O$ .

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The chemical formula of Cryolite an important mineral of aluminium is:

Q. (a) Give the chemical name and formula of 'cryolite'.
(b) What is the function of cryolite in the extraction of aluminium, other than acting as a solvent for bauxite?

(a) Give the chemical names and formulae of main ores of (i) aluminium (ii) iron (iii) zinc.

(b) Which impurities are present in bauxite.

(c) What is red mud, how is it removed?

Q. In the extraction of aluminium ;
(i) name the process of concentration of bauxite.
(ii) write the cathode reaction in electrolytic reduction of alumina.
(iii) write the function and chemical formula of cryolite.
(iv) write a chemical equation for the action of heat on aluminium hydroxide.
(v) why is it necessary to replace anodes time to time?

Q. Bauxite, diaspore and cryolite are the ore of the:

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