NEET Chemistry: Sodium Carbonate questions with solutions

Q1. Q Type your question One of the chief uses of sodium carbonate has been in the conversion of \( \operatorname{Ca}(O H)_{2}(s) \) to concentrated aqueous solution of NaOH which in turn was used in the manufacture of soap. \( \boldsymbol{C a}(\boldsymbol{O H})_{2}(\boldsymbol{s})+\boldsymbol{2} \boldsymbol{N} \boldsymbol{a}^{+}(\boldsymbol{a q})+ \) \( \boldsymbol{C O}_{3}^{2-}(\boldsymbol{a q}) \rightleftharpoons \boldsymbol{C a C O}_{3}(\boldsymbol{s})+ \) \( \mathbf{2} N \boldsymbol{a}^{+}(\boldsymbol{a} \boldsymbol{q})+\mathbf{2} \boldsymbol{O} \boldsymbol{H}^{-}(\boldsymbol{a} \boldsymbol{q}) \) In \( 1775, \) in order to gain independence from the importation of natural \( N a_{2} C O_{3}, \) the French government offered a prize to anyone who could devise a process to prepare \( N a_{2} C O_{3} \) from NaCl A more economical process but based on the same principle was given by :

1. Solvay
2. Leblanc
3. williamson
4. Haber

Answer: Solvay

The Solvay process is the economical industrial route for producing sodium carbonate from NaCl. It relies on converting brine into sodium bicarbonate, which is then heated to give Na2CO3.