Which gas is usually liberated when an acid reacts with a metal? Illustrate with an example. How will you test for the presence of this gas ?
Write an equation to show the reaction between Plaster of Paris and water.
What is the common name of the compound $CaOCl_2$ ?
How is the concentration of hydroxide ions $(OH^-)$ affected when excess base is dissolved in a solution of sodium hydroxide ?
Why does distilled water not conduct electricity, whereas rain water does ?