CHEMISTRY AND GAS PROPERTIES

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

Clues

  • Th is gas is lighter than air and puts out a flame, divers often use this gas (6)
  • This is a brown gas and is poisonous. It causes acid rain (8, 7)
  • This is the gas in gas taps, it burns with a blue flame (7)
  • This is the gas we breathe, it puts flames out and turns limewater a milky colour (6, 7)
  • This is the gas we need to stay alive, it relights a burning splint, and it is needed for burning (6)
  • This makes up 78% of the air, a glowing splint will go out and the gas is very unreactive (8)
  • Used in lightbulbs and doesn't react at all (5)

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