Which of the following processes occurs in the reaction given below $C_{(graphite)} \longrightarrow C_{(g)}$?

When is fractional distillation used?

$A$ mixture of camphor and benzoic acid can be separated by:

What is an element?

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 is not an element?