Question

Sulphuric acid is manufactured by contact process.
write the main reactions of this process.

Answer 1

Main reactions of this process are:
S + O₂ → SO₂
2SO₂ + O₂  2SO₃
SO₃ + H₂SO₄ → H₂S₂O₇
H₂S₂O_{7 +} H₂O → 2H₂SO₄