CHEMISTRY AND GAS PROPERTIES

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

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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