CHEMISTRY AND GAS PROPERTIES

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