Cracking and Alkenes

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

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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