Question

S→ZnS→H2S→SO2→H2SO4→Na2SO4→NaCl.

Answer 1

1)Zn+S=ZnS
2)ZnS+H₂O=H₂S+ZnO
3)H₂S+O₂=SO₂↑+H₂O
4)2SO₂+O₂=2SO₃
   SO₃+H₂O=H₂SO₄
5)H₂SO₄+Na₂SiO₃=Na₂SO₄+H₂SiO₃↓
6)Na₂SO₄+BaCl₂=NaCl+BaSO₄↓