Question

what is test tube and test tube holder

Answer 1

A test tube holder is used to holdTest Tubes. It is used for holding atest tube in place when the tube is hot or should not be touched. For example, a test tube holder can be used to hold a test tube while it is being heated.

Answer 2

Test tube is a laboratory apparatus which is used while performing experiments whereas test tube holder is used to hold the test tube ☺ ☺