CHEMISTRY AND GAS PROPERTIES

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

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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