Define the nature of matter.

Draw a diagram showing the setup of the apparatus for the process. Draw a diagram of a bubble plate type fractionating column. When do we require such a type of column for separating two liquids? Explain the principle involved in the separation of components of a mixture of liquids by using a fractionating column. What industrial applications does this process have?

Which of the following substances consists of only one element?

Name a suitable technique for the separation of the components from a mixture of calcium sulphate and camphor.

Give the technique for the separation of the following:
$(i)$ Mixture of sugar and sand
$(ii)$ Mixture of kerosene and water
$(iii)$ Mixture of benzene and common salt
$(iv)$ Mixture of liquids with boiling points $356 \, K$ and $365 \, K$
$(v)$ Mixture of aniline and camphor

Which one of the following is not an element?