Answer. Solvay's process has the following advantages:
(i) It is a cheap process as raw materials are available at very low prices.
(ii) Carbon dioxide and ammonia are recovered and reused.
(iii) Process is pollution free, because the only waste is calcium chloride solution.
(iv) Sodium carbonate of very high purity is obtained.
(v) Consumption of fuel is very less since no solution is to be evaporated.