CHEMISTRY AND GAS PROPERTIES

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

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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