In the extraction of aluminum from purified bauxite by electrolysis, cryolite is used because
it makes bauxite a better conductor of electricity
it makes bauxite melt at a lower temperature
it makes aluminium purer
it prevents aluminium from getting oxidized
it protects the carbon electrodes used in the process
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The extraction is done by electrolysis. But first
the aluminium oxide must be made molten so
that electricity can pass through it. Aluminium
oxide has a very high melting point (over
2,000°C), so it would be expensive to melt it.
Instead, it is dissolved in molten cryolite, an
aluminium compound with a lower melting point
than aluminium oxide. The use of cryolite
reduces some of the energy costs involved in
extracting aluminium.
B. It makes bauxite melt at a lower temperature.
This improves the economy of the process.
Are you guys sure of what you are saying? Pls myschool the answer is B not A!! Pls do make research before finalizing on the option being given because it' quite alarming o myschool
It should be A cos it help to ionize bauxite dereby making it av mobile electron
