X reacts with aqueous NaOH solution to form Y and H_(2). Aqueous solution of Y is heated to 323-33 K and on passing CO_(2) into it,Na_(2)CO_(3) and Z were formed. When Z is heated to 1200^(@)C, Al_(2)O_(3) is formed. X, Y and Z respectively are

X reacts with aqueous NaOH solution to form Y and H_(2). Aqueous solut

1.	X reacts with aqueous NaOH solution to form Y and H_(2). Aqueous solution of Y is heated to 323-33 K and on passing CO_(2) into it,Na_(2)CO_(3) and Z were formed. When Z is heated to 1200^(@)C, Al_(2)O_(3) is formed. X, Y and Z respectively are
Answer» `Al, AlCl_(3), NaAlO_(2)` `Zn, Na_(2), ZnO_(2), AlCl_(3)` `Al, Al(OH)_(3), AlCl_(3)` `Al, NaAlO_(2), Al(OH)_(3)` Solution :`underset((X))(2AL)+2NaOH + 2H_(2)O rarr underset((Y))(2NaAlO_(2))+3H_(2)O + underset((Y))(2NaAlO_(2))+3H_(2)O+CO_(2) overset(323-333K)rarr underset((Z))(Al(OH)_(3)) darr+Na_(2)CO_(3) + underset((Z))(2Al(OH)_(3))overset(1200^(@)C)rarr Al_(2)O_(3)+3H_(2)O` (Hall's process for purificationof bauxite)