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Q8 Co2 cut the supply of oxygen and if oxygen is not supplied then the flame got EXTINGUISHED
Q9 bcoz HEAP of green leaves contain water but dry leaves contain no water so it catches fire easily
Q12 No it can't be called combustion because rusting only take place with iron and combustion is happens with flame
Q13 Ramesh beaker will heated FASTER than ABIDA bcoz blue flame is more hot than yellow flame


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