The sequence you provided shows the oxidation reactions of zinc metal leading to the formation of different zinc compounds.

Zn (Zinc metal)ZnS (Zinc sulfide) - Zinc metal reacting with sulfur to form zinc sulfideZnO (Zinc oxide) - Zinc metal reacting with oxygen to form zinc oxideZn(OH)2 (Zinc hydroxide) - Zinc oxide reacting with water to form zinc hydroxideZn (Zinc metal)

These reactions represent the transformation of zinc metal into different compounds through reactions with other elements.