CHEMISTRY AND GAS PROPERTIES

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

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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