we use test tube to hold chemicals and heat and chemicals.
Test tube rack is use to hold test tube when they are not in use.
use to hold test tube..
the answer is none
When heating a test tube, you would use a test tube holder. It can also be used to hold/ support pipettes, etc. http://www.answers.com/mt/test-tube-holder
it is use to hold the test tube
When heating a liquid in a test tube, make sure to use a Bunsen burner or a hot plate, and gently heat the bottom of the test tube. Avoid heating the liquid too quickly to prevent bumping or boiling over. Use a test tube holder to hold the test tube and prevent accidental spills or burns.
When heating a test tube over a Bunsen burner, you typically use heat-resistant gloves to handle the test tube, a test tube holder to hold the test tube, and a Bunsen burner for heating. It's also important to have a heat-resistant mat or pad to place the test tube on while heating.
Test tube racks are used to support the test tubes but unlike the test tube holder, it can store the test tubes without anyone who will hold the rack... hope this helps!
To help clean used test tubes.
Tan Stopper
No. The noun remains two words "test tube" with test as a noun adjunct.As an adjective, it may be hyphenated, but this is informal use in any caseE.g. test-tube baby (in vitro fertilization)
When heating liquids in a test tube, ensure that the test tube is pointing away from yourself and others to prevent burns in case of splashing or boiling over. Use a test tube holder to hold the test tube as it can get hot. Also, heat the liquid gently and avoid overheating to prevent the test tube from shattering.