Fuels

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Across
  1. 2. produces carbon dioxide, water vapour and a certain amount of energy in the presence of plentiful oxygen
  2. 4. homologous series of hydrocarbon which are unreactive and colourless in nature
  3. 7. compounds which contain hydrogen and carbon atoms only
  4. 8. the main constituent of natural gas
  5. 9. use for making and surfacing roads
  6. 10. separation of petroleum into useful fractions
Down
  1. 1. refers to the ease of flow of a liquid
  2. 3. has only single bonds between its carbon-carbon atoms
  3. 5. a mixture of hydrocarbons
  4. 6. refers to the tendency of a substance to vaporize