CHEMISTRY AND GAS PROPERTIES

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

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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