Question

select the test tube.
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identify laboratory tools (100)

Explanation:

A test tube is a common laboratory glassware. It is typically a cylindrical - shaped tube with an open top. The first image shows a simple cylindrical tube which is the characteristic shape of a test tube. The second image is a conical flask (Erlenmeyer flask) which has a conical shape and is used for mixing and heating liquids. The third image is a volumetric flask which is used for precise measurement of liquid volumes and has a bulb - like shape with a narrow neck and a mark indicating a specific volume.

Answer:

The first image (the simple cylindrical tube) is the test tube.