Identify the chemical reactions presented in the image.

Chemical Reactions:

The image displays three chemical reactions:

1. \( Fe_2O_3 + H_2 \rightarrow H_2O + Fe \)
2. \( Na_2SO_3 + O_2 \rightarrow Na_2SO_4 \)
3. \( Zn + H_2SO_4 \rightarrow ZnSO_4 + S + H_2O \)

Note: These equations appear to be unbalanced as written. In a chemistry context, balancing equations is crucial for accurate representation of reactions.