In Solvay's ammonia soda process for the manufacture of washing soda which of the following does not happen

In Solvay's ammonia soda process for the manufacture of washing soda w

1.	In Solvay's ammonia soda process for the manufacture of washing soda which of the following does not happen
Answer» The raw material recyled is ammonia The by product is calcium chloride The intermediate compounds formed are ammonia hydrogen CARBONATE and SODIUM hydrogen carbonate FORMATION of ammonia hydrogen carbonate by the reaction of `NH_(3), H_(2)O` and `CO_(2)` is redox reaction . ANSWER :D