1.

The carbon- basedreductionmethodis NOT usedfortheextractionof

Answer»

tin from ` SnO_2 `
IRON from` Fe_2O_ 3 `
ALUMINIUM from alumina
magnesiumfrom` MgCO_3.CaCO_3 `

SOLUTION :HighlyelectropositivemetalslikeAlandMg arenot obtainedbyreductionoftheiroxideswith carbonsincetheyformtheircorrespondingcarbides.Insteadtheyareobtainedby electrolyticreductionoftheirfusedsalts,i.e.,AL fromfused`Al_2O_3`andMgfromfused` MgCl _2`


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