Which lab instrument is adjustable for any volume and uses a plunger to control delivery of fluid?

Which lab instrument is adjustable for any volume and uses a plunger to control delivery of fluid?

• A. Automatic Pipette
• B. Beaker
• C. Bottle
• D. Florence Flask

Answer: (A)

An automatic pipette is designed for precise liquid transfer with adjustable volume and controlled delivery using a plunger. The volume is set on a dial, allowing you to choose the exact amount to transfer, and the top plunger button controls uptake and release—you press to first stop to draw liquid into the disposable tip, then to second stop to dispense the full amount. This combination of adjustable volume and plunger-controlled delivery is what enables accurate measurement and transfer of small volumes. In contrast, beakers, bottles, and Florence flasks are general-purpose containers for holding or mixing liquids and do not provide precise volume control or a plunger mechanism for dispensing.

An automatic pipette is designed for precise liquid transfer with adjustable volume and controlled delivery using a plunger. The volume is set on a dial, allowing you to choose the exact amount to transfer, and the top plunger button controls uptake and release—you press to first stop to draw liquid into the disposable tip, then to second stop to dispense the full amount. This combination of adjustable volume and plunger-controlled delivery is what enables accurate measurement and transfer of small volumes. In contrast, beakers, bottles, and Florence flasks are general-purpose containers for holding or mixing liquids and do not provide precise volume control or a plunger mechanism for dispensing.