Crude Oil

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

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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