Boiling tube
small cylindrical vessel used to strongly heat substances in the flame of a Bunsen burner; larger than a test tube; designed to be wide enough to allow substances to boil violently From Wikipedia, the free encyclopedia
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A boiling tube is a large tube made of glass, which is used in laboratory to strongly heat substances. A boiling tube is a scaled-up test tube, but larger in size. This larger size allows substances to boil freely inside a boiling tube.
Boiling tubes can also be used as a replacement for test tubes specially when a larger volume is desired.
Boiling tubes are commonly made from Pyrex glass which can tolerate high temperatures.
Boiling tube is also known as Hard Glass Tube
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