Refining of Petroleum

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Across
  1. 2. Compounds made of only carbon and hydrogen is called ______________.
  2. 4. When a substance in the gaseous state cools below its boiling point, it _____________.
  3. 5. the component of petroleum which is liquefied in lowest level of the column
  4. 9. ___________ is used in LPG cylinders.
  5. 12. The process of separation of a mixture into its constituents based on their boiling points.
  6. 13. Liquids having lower boiling points liquefy at lower temperatures towards the of ______________ the column
  7. 14. Kerosene is used as fuel for __________ and lanterns.
  8. 15. petroleum gas has the _________ boiling point.
Down
  1. 1. lubricanting oil is used for making ___________.
  2. 3. residue is used for ____________ of roads and in paints.
  3. 4. The process of seperating ____________ into useful component is known as refining of petroleum.
  4. 6. ____________ is used as fuel for engines and generators.
  5. 7. Various components obtained in the process of refining petroleum is called _____________.
  6. 8. Petroleum is also called crude oil or ____________.
  7. 10. ____________ is used in production of different chemicals.
  8. 11. Liquids having higher boiling points liquefy at ___________ temperatures at the lower level of the column.