Which term refers to a thin glass tube closed at one end, used in laboratories?

Which term refers to a thin glass tube closed at one end, used in laboratories?

• A. Test tube
• B. Beaker
• C. Flask
• D. Pipette

Answer: (A)

A test tube is a small, slender cylindrical glass vessel with a closed bottom and an open top, designed to hold and heat small amounts of liquids or to observe reactions. Its thin, tube-like shape fits the description of a thin glass tube used in laboratories. Beakers are wider and open at the top, meant for measuring and mixing larger quantities. Flasks have a broader body with a narrow neck, and pipettes are long, thin tubes used primarily to transfer precise amounts of liquid. So, the term that best matches a thin glass tube used in labs is test tube.

A test tube is a small, slender cylindrical glass vessel with a closed bottom and an open top, designed to hold and heat small amounts of liquids or to observe reactions. Its thin, tube-like shape fits the description of a thin glass tube used in laboratories. Beakers are wider and open at the top, meant for measuring and mixing larger quantities. Flasks have a broader body with a narrow neck, and pipettes are long, thin tubes used primarily to transfer precise amounts of liquid. So, the term that best matches a thin glass tube used in labs is test tube.