Question

What is fusion glass tube?

Answer 1

Fusion tube is a small tube used for conducting experiments such as sodium fusion test or for finding the melting / boiling point in which the sample is to be heated excessively

Answer 2

Fusion glass tube is a small glass tube used for conducting experiments, such as the sodium fusion test (Lassaigne's test) or for finding the melting/boiling point, in which (a small amount of) the sample is to be heated excessively.