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p-Block Elements - I
easy
In the electrolytic method of obtaining aluminium from purified bauxite, cryolite is added to the charge in order to
A
Minimize the heat loss due to radiation
B
Protect aluminium produced from oxygen
C
Dissolve bauxite and render it conductor of electricity
D
Lower the melting point of bauxite
Solution
(c) In electrolytic method of obtaining aluminium from purified bauxite, cryolite is added to charge because it reduces the melting point of Bauxite (from ${1200\,^o}C$ to ${800^o} – {900\,^o}C$) and also it increases electrical conductivity of mixture.
Standard 11
Chemistry
