CHEMISTRY AND GAS PROPERTIES

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