question no 29 a,b and c
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a) Compressed Nitrogen gas +water.
b) They (Nitrogen and Water) work by smothering the fire: when you put a layer of powder or foam on the fire, you cut the fuel off from the oxygen around it, and the fire goes out.
c) Carbon Dioxide.
b) They (Nitrogen and Water) work by smothering the fire: when you put a layer of powder or foam on the fire, you cut the fuel off from the oxygen around it, and the fire goes out.
c) Carbon Dioxide.
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