Cracking and Alkenes

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D T P X T W O M P U P E P S B J V C B J A
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N R O G N A B D P X S G H G O M Q D G E B
Y Q K J W D U A Y U U L C E W H V Q U X V

Clues

  • Alkene molecules can be used to make plastic AKA (8)
  • Alkenes are (12)
  • Alkenes are UN (11)
  • Cracking is a (7, 13)
  • In cracking, oil fractions are heated so they (9)
  • To heat the oil it can be passed over catalyst or... (5, 4, 5)

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