Crude Oil

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

Clues

  • Compounds only containing hydrogen and carbon (12)
  • How easily it burns (12)
  • How easy it flows (9)
  • Poisonous gas (6, 8)
  • Short-chain hydrocarbons and low boiling point alkanes, used as a fuel (9, 3)
  • Tall tower where fractioning happens (11, 6)
  • The hydrocarbons are cracked when this takes place (7, 13)
  • The size of the molecule depends on its... (7, 5)
  • The tendency to turn into a gas (10)
  • Used for fuel in car engines (8, 6)

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