Question

What is are the test tubes and what are the functions

Answer 1

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Here is the answer to your question:

Test tubes are handheld tubes used for mixing or heating chemicals in a laboratory. They are open at the top and rounded at the bottom, and usually made of glass or plastic materials. ... A type of labware, test tubes are sometimes called culture or sample tubes, depending upon the application.

The function of a test tube is to hold, mix or heat small quantities of liquid or solid chemicals for assays and qualitative experiments. Test tubes also serve as temporary storage for chemicals to be used in chemical experiments.

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Answer 2

Answer:These are small glass tube in which one end is closed

Function : used for carrying out different tests