HBr ---- h2 -------H2S ---------SO2

Question

HBr ---- h2 -------H2S ---------SO2

Answer 1

1) 2HBr + Zn -> H2 + ZnBr2
2) H2 + S -> H2S
3) 2H2S + 3O2 -> 2SO2 + 2H2O