Assuming you're talking about a wooden or metal 'rack' which is capable of holding a few test-tubes. They are simply a safe way to allow test tubes to stand upright without falling over. A hot test tube, or one holding corrosive chemicals - is safer supported by a rack - than being held in someone's hand !
A clamp or test tube holder is typically used to hold a test tube in distillation setups to secure it in place during the distillation process.
The test tube holder has many functions. It can be used to hold test tubes, making it easy to investigate the contents of the test tubes. These holders can also be used to hold stirring rods used in the laboratory and pipettes.
Like the function of a beaker; to hold chemicalsA test tube is another useful science equipment used in experiments. A test tube is used:-1. to carry solids or liquids in small quantity.2. to do experiments, such as knowing the nature of the substance poured in it( acidic, basic or neutral) .basically, test tube's function is to carry substances in science labs.
A test tube holder or test tube clamp is used to hold a test tube when heating it over a Bunsen burner. The holder provides a safe way to hold the test tube without the risk of burning yourself.
A test tube holder, also known as test tube clamp or test tube rack, is used to hold a test tube in place when the tube is hot or should not be touched. It allows safe handling of test tubes during heating or when conducting chemical reactions.
A clamp or test tube holder is typically used to hold a test tube in distillation setups to secure it in place during the distillation process.
A test tube holder or rack is used in a laboratory to hold or support test tubes containing chemicals or other contents awaiting further operations. Although it is called a test tube holder, it is also used to hold/support pipettes, etc. Since a test tube has a rounded bottom, it cannot stand by itself; the rack is a convenient and necessary piece of laboratory equipment for the storage of test tubes.
The test tube holder has many functions. It can be used to hold test tubes, making it easy to investigate the contents of the test tubes. These holders can also be used to hold stirring rods used in the laboratory and pipettes.
Test tube holder
use to hold test tube..
Like the function of a beaker; to hold chemicalsA test tube is another useful science equipment used in experiments. A test tube is used:-1. to carry solids or liquids in small quantity.2. to do experiments, such as knowing the nature of the substance poured in it( acidic, basic or neutral) .basically, test tube's function is to carry substances in science labs.
Test Tube brushes are used to easily clean the test tubes .
A test tube holder is a piece of laboratory equipment designed to securely hold test tubes while they are being handled or stored. It typically consists of a spring-loaded clamp that can accommodate test tubes of different sizes, and a handle for easy manipulation.
A test tube holder or test tube clamp is used to hold a test tube when heating it over a Bunsen burner. The holder provides a safe way to hold the test tube without the risk of burning yourself.
used to chemical test
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
A test tube holder, also known as test tube clamp or test tube rack, is used to hold a test tube in place when the tube is hot or should not be touched. It allows safe handling of test tubes during heating or when conducting chemical reactions.