CHEMISTRY AND GAS PROPERTIES

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

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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