Chemistry Past Questions and Answers

When large hydrocarbon molecules are heated at high temperature in the presence of a catalyst to give smaller molecules, the process is known as

In the removal of water hardness, permutit is regenerated with a strong solution of

A sample of hard water contains some calcium sulphate and calcium hydrogen carbonate. The total hardness may therefore be removed by

Which of the following separation techniques can be employed in obtaining solvent from its solution?