Verified answer

[tex]\bf 1) ~ \boxed{\bf Zn(NO_3)_2 \xrightarrow{Na_2S} X \to ZnO \to Zn}[/tex]

[tex]\sf 1)~\sf Zn(NO_3)_2 + Na_2S \to ZnS\downarrow + 2NaNO_3.[/tex]
[tex]\sf 2)~2ZnS + 3O_2 \to 2ZnO + 2SO_2\uparrow.[/tex]
[tex]\sf 3)~ZnO + C \to Zn + CO\uparrow.[/tex]
[tex]\bf 2) ~ \boxed{\bf AlBr_3 \to Al(NO_3)_3 \xrightarrow{t^{\circ}C} X \to AlCl_3}[/tex]
[tex]\sf 1) ~\sf AlBr_3 + 3AgNO_3 \to 3AgBr\downarrow + Al(NO_3)_3.[/tex]
[tex]\sf 2) ~ \sf 4Al(NO_3)_3 \xrightarrow{t^{\circ}C} 2Al_2O_3 + 12NO_2\uparrow + 3O_2\uparrow.[/tex]
[tex]\sf 3)~Al_2O_3 + 6HCl \to 2AlCl_3 + 3H_2O.[/tex]