Select the incorrect statement. (1) In the Bayers, \( \mathrm{Al}_{2} \mathrm{O}_{3} \) goes in ...

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Select the incorrect statement.
(1) In the Bayers, \( \mathrm{Al}_{2} \mathrm{O}_{3} \) goes in to solution as soluble \( \left[\mathrm{Al}(\mathrm{OH})_{4}\right]^{-} \)while other basic oxides as \( \mathrm{TiO}_{2} \) and \( \mathrm{Fe}_{2} \mathrm{O}_{3} \) remain insoluble
(2) Extraction of zinc from zinc blende is achieved by roasting followed by reduction with carbon.
(3) The methods chiefly used for the extraction of lead and tin are respectively carbon reduction and electrolytic reduction.
(4) Extractive metallurgy of magnesium involves fused salt electrolysis.
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