Which item is commonly used to transfer a precise liquid volume and comes in common sizes such as 10 mL or 25 mL?

Which item is commonly used to transfer a precise liquid volume and comes in common sizes such as 10 mL or 25 mL?

• A. Volumetric Pipet
• B. Graduated Cylinder
• C. Funnel
• D. Beaker

Answer: (A)

Precise transfer of a specific liquid volume relies on instruments calibrated to deliver a defined amount. A volumetric pipet is built for that purpose: it delivers a single, exact volume every time it’s used, defined by its calibration mark. The common sizes like 10 mL and 25 mL show up because many protocols specify those exact volumes for making dilutions or preparing standards. This differs from other tools: a graduated cylinder can measure volumes with multiple marks but is less precise for a single exact amount; a beaker is mainly for holding or mixing and is only rough in its volume estimate; a funnel simply guides flow and doesn’t control volume. Using a volumetric pipet correctly—filling to the calibration line and delivering by gravity—yields much higher accuracy and repeatability for precise experiments.

Precise transfer of a specific liquid volume relies on instruments calibrated to deliver a defined amount. A volumetric pipet is built for that purpose: it delivers a single, exact volume every time it’s used, defined by its calibration mark. The common sizes like 10 mL and 25 mL show up because many protocols specify those exact volumes for making dilutions or preparing standards.

This differs from other tools: a graduated cylinder can measure volumes with multiple marks but is less precise for a single exact amount; a beaker is mainly for holding or mixing and is only rough in its volume estimate; a funnel simply guides flow and doesn’t control volume. Using a volumetric pipet correctly—filling to the calibration line and delivering by gravity—yields much higher accuracy and repeatability for precise experiments.