S + Zn→ ZnS
2 HCl + ZnS → H2S + ZnCl2
3 O2 + 2 H2S → 2 H2O + 2 SO2
2 NaOH + SO2 → H2 + Na2SO4
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S + Zn→ ZnS
2 HCl + ZnS → H2S + ZnCl2
3 O2 + 2 H2S → 2 H2O + 2 SO2
2 NaOH + SO2 → H2 + Na2SO4