Question

Common salt besides being used in kitchen can also be used as the raw material for making:
(i) washing soda
(ii) bleaching powder
(iii) baking soda
(iv) slaked lime

• A. (i) and (ii)
• B. (i) and (iii)
• C. (i), (ii) and (iv)
• D. (i), (iii) and (iv)

Answer 1

Answer: (A)

A. Baking soda is sodium hydrogen carbonate which is prepared by Solvay process which is the reaction of sodium chloride,ammonia and carbon dioxide in water. The calcium carbonate is used in the reaction to get carbon dioxide gas.
${CaCO}_3\to CaO+{CO}_2{2NH}_3+{CO}_2+H_{2}O\to {\left({NH}_4\right)}_2{CO}_3+{CO}_2+H_{2}O\to {NH}_4{HCO}_3{NH}_4{HCO}_3+NaCl\to {NaHCO}_3+{NH}_{4}Cl$
B. Washing soda is sodium carbonate which is prepared from the sodium chloride.
$2NaCl+{CaCO}_3\to {Na}_2{CO}_3+Ca{Cl}_2$