Question

The process associated with sodium carbonate manufacture is known as ................  Process.

(a) Chamber

(b) Haber

(c) Le-Blanc

(d) Castner

Answer 1

Correct option (c) Le-Blanc

Explanation: 

Le-Blanc process : It involves the following steps :

NaCl + H₂SO₄ → NaHSO₄ + HCI

NaHSO₄ + NaCl → Na₂SO₄+ HCI

Na₂SO₄ + CaCO₃, + 4C →  Na₂CO₃ + CaS + 4CONa₂CO₄ 

Na₂CO₃ is separated from CaS by dissolving it in water.