What is Boiling tube?
[[image:Test_tube_true_C.png|frame|A boiling tube looks much like a test tube.]] 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 [[temperature]]s. Boiling tube is also known as Hard Glass Tube {{LaboratoryEquipment}} [[Category:laboratory equipment]]