A refinery laboratory is checking four proposed groups of alkanes.
| Group | Molecular formulae of the alkanes in the group |
|---|---|
| J | C5H12\text{C}_5\text{H}_{12}C5H12, C6H14\text{C}_6\text{H}_{14}C6H14, C7H16\text{C}_7\text{H}_{16}C7H16 |
| K | C2H6\text{C}_2\text{H}_6C2H6, C8H18\text{C}_8\text{H}_{18}C8H18, C15H32\text{C}_{15}\text{H}_{32}C15H32 |
| L | C4H10\text{C}_4\text{H}_{10}C4H10, C11H24\text{C}_{11}\text{H}_{24}C11H24, C19H40\text{C}_{19}\text{H}_{40}C19H40 |
| M | C3H8\text{C}_3\text{H}_8C3H8, C13H28\text{C}_{13}\text{H}_{28}C13H28, C22H46\text{C}_{22}\text{H}_{46}C22H46 |
Which group has the pattern expected for a single fraction of crude oil?
Group K
Group M
Group J
Group L
91 exam-style questions on AQA GCSE Chemistry 7.1 Carbon compounds as fuels and feedstock, covering 7.1.1 Crude oil, hydrocarbons and alkanes, 7.1.2 Fractional distillation and petrochemicals, 7.1.3 Properties of hydrocarbons, and 7.1.4 Cracking and alkenes. Each one has a worked solution and a mark scheme showing where the marks go.