ICSE Class 10 Answered
(i) Name the most common ore of Aluminium.(ii) Define mineral. (iii) Give the formula of Bauxite.(iv) Which two chemical compounds are added to pure bauxite at the time of electrolytic reduction and why?
Asked by Topperlearning User | 14 Jul, 2015, 04:30: PM
Expert Answer
(i) Bauxite is the most common ore of aluminium.
(ii) Mineral:The naturally occuring compounds of metals which are generally mixed with other matter such as soil,sand,limestone and rocks are known as minerals.
(iii) Bauxite : Al2O3.2H2O
(iv) Cryolite and Fluorspar
(1) It reduces the melting point or fusion temperature of pure alumina.
(2) To increase the electrical conductivity of the electrolyte.
(3) Cryolite acts as a solvent.
Answered by | 14 Jul, 2015, 06:30: PM
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