hydrocarbons

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Across
  1. 2. A measure of how thick or runny a liquid is
  2. 5. distillation The process of separating crude oil into fractions
  3. 6. A hydrocarbon with only single bonds
  4. 11. A fuel fraction used in jet engines
  5. 12. An alkane with six carbon atoms
  6. 13. tar A viscous by-product of coal and oil processing
  7. 14. An alkane with three carbon atoms
  8. 16. An alkane with two carbon atoms
  9. 20. A hydrocarbon with at least one double bond
  10. 21. The simplest alkane, with one carbon
  11. 22. Distilled part of crude oil containing similar hydrocarbons
  12. 23. An alkane with four carbon atoms
Down
  1. 1. An alkane with nine carbon atoms
  2. 3. Hydrocarbons with double or triple bonds
  3. 4. A reaction of hydrocarbons with oxygen releasing energy
  4. 7. oil A thick oil fraction used to reduce friction in engines
  5. 8. Breaking large hydrocarbons into smaller ones
  6. 9. Compounds with the same molecular formula but different structures
  7. 10. An alkane with five carbon atoms
  8. 14. A fuel fraction used in cars
  9. 15. An alkane with eight carbon atoms
  10. 17. An alkane with seven carbon atoms
  11. 18. Hydrocarbons with only single bonds
  12. 19. An alkane with ten carbon atoms