Chemistry

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Across
  1. 2. Group of substances with similar boiling points
  2. 7. Source of light(coal gas for example)
  3. 8. Compounds that consist only of the elements carbon and hydrogen and contain at least one carbon-carbon double or triple bond
  4. 11. Surname of polish pharmacist who in 1856 built the world`s first modern oil refinery
  5. 14. Petroleum is a mixture of __________( organic compounds consisting entirely of Hydrogen and Carbon)
Down
  1. 1. Process of separating the components or substances from a liquid mixture by boiling and condensation
  2. 3. Oil that is left after crude oil distillation
  3. 4. Coal gas is a mixture of H2, CH4, CO and
  4. 5. By-product of pyrolysis, thick, black liquid
  5. 6. Pyrolysis is ______ process
  6. 9. It is used in the production of fertilizers
  7. 10. Product of coal pyrolysis used to produce synthesis gas
  8. 12. Thermal decomposition of materials in the absence of oxygen.
  9. 13. Device used to condense vapour into liquid