Crude Oil

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

Clues

  • Compounds only containing hydrogen and carbon (12)
  • How easily it burns (12)
  • 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 as fuel in diesel engines and as boiler fuel (6, 3)
  • Used for fuel in car engines (8, 6)

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