Explain why, sodium hydrogencarbonate is used as an antacid.

What is the common name of sodium hydrogencarbonate?

What happens when a solution of sodium hydrogencarbonate is heated? Write equation of the reaction involved.

What does a soda-acid type fire extinguisher contain? How does it work? Explain the working of a soda � acid fire extinguisher with the help of a labelled diagram.

What happens when a concentrated solution of sodium chloride (brine) is electrolyzed? Write the equation of the reaction involved.