question_answer

  Answer the following (a) Why is sodium hydrogen carbonate an essential ingredient in most antacids? (b) When electricity is passed through an aqueous solution of sodium chloride, three products are obtained. Why is the process called chlor-alkali process?

Answer:

                  (a) B is sodium hydroxide (NaOH).                 (1)  (b) Neutralisation reaction occurs when B is treated with an acidic oxide.                          (1)   (c)