Aluminium is the most abundant metal in earth's crust. False statement about the metallurgy of Aluminium among the following is
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a
Bauxite is the chief ore of Aluminium
b
Alumina is a bad conductor of electricity
c
Sodium meta aluminate is insoluble in water
d
Cryolite is 3NaF.AlF3
answer is C.
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Detailed Solution
Alumina is a bad conductor, it is mixed with Fluorspar and Cryolite to increase conductivity and decrease melting temperature.Bauxite is amphoteric.It can react with caustic soda to form a soluble Na[Al(OH)4].