What will happen if a solution of sodium hydrogen carbonate is heated? Give the equation of the reaction involved.

Write an equation to show the reaction between Plaster of Paris and water.

A solution reacts with crushed egg-shells to give a gas that turns lime-water milky. The solution contains

1. NaCl
2. HCl
3. LiCl
4. KCl

10 mL of a solution of NaOH is found to be completely neutralized by 8 mL of a given solution of HCl. If we take 20 mL of the same solution of NaOH, the amount of HCl solution (the same solution as before) required to neutralize it will be

1. 4 mL
2. 8 mL
3. 12 mL
4. 16 mL