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A flask is used to mantain temperature of something inside it. It prevents the loss of heat through convection, conduction or radiation. It has a vaccum in between the refill â¦and the wall which stops convection and conduction. The walls are coloured white so that heat does not radiate.
Confidence votes 14.3K. A gas syringe is basically a device that fills up with a gas that is produced and gives a volume for that gas. Gas from a reaction is forced into the syringe due to pressure and the syringe plunger is forced out (just like how you suck up a liquid with a normal syringe). It can be used to detect the volume of gas produced in a chemical reaction for instance. See the Web Links to the left for more information.