A manufacturer prepares a liquid mixture containing alkanes with a range of chain lengths. The mixture is separated into groups with similar boiling points using a fractionating column.
Complete the sentences about the column.
Use words from the list.
covalent bonds decreases gas increases intermolecular forces liquid solid
The mixture is heated so that it turns into a ............... before it enters the column.
Going up the column, the temperature ............... .
When a hydrocarbon reaches a tray that is cooler than its boiling point, it turns into a ............... and is piped off.
Hydrocarbons with longer chains have stronger ............... between their molecules, so they are collected lower down the column.
131 exam-style questions on OCR GCSE Chemistry 6.2 Organic chemistry, covering 6.2.1 Crude oil and fractional distillation, 6.2.2 Cracking and dependence on hydrocarbons, 6.2.3 Functional groups and homologous series, 6.2.4 Reactions of alkanes, alkenes and alcohols, 6.2.5 Addition polymerisation and repeat units, 6.2.6 Naturally occurring polymers, 6.2.7 Chemical cells and fuel cells, and 6.2.8 Condensation polymerisation and how to make one. Each one has a worked solution and a mark scheme showing where the marks go.