Cracking and Alkenes

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

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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