Which instrument is used to measure and pour exact amounts of a liquid?

Which instrument is used to measure and pour exact amounts of a liquid?

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

Answer: (A)

Measuring and transferring an exact volume relies on a tool designed for precision. A volumetric pipet is built to deliver a specific, known volume with high accuracy. It is calibrated to a single volume mark, and you fill to that mark and dispense carefully to ensure the exact amount is transferred. This precision comes from its design and the technique used to release the liquid, often with a bulb to control the flow. A graduated cylinder can measure volumes and is useful for approximate measurements, but it isn’t as precise because reading the meniscus, parallax, and the tolerances between graduations introduce more error. A beaker is a general container with rough volume markings and is used more for mixing or rough pours, not for exact transfers. A funnel’s job is to guide liquid into a container, not to measure or dispense precise volumes. So, for measuring and pouring an exact amount, the volumetric pipet is the best choice.

Measuring and transferring an exact volume relies on a tool designed for precision. A volumetric pipet is built to deliver a specific, known volume with high accuracy. It is calibrated to a single volume mark, and you fill to that mark and dispense carefully to ensure the exact amount is transferred. This precision comes from its design and the technique used to release the liquid, often with a bulb to control the flow.

A graduated cylinder can measure volumes and is useful for approximate measurements, but it isn’t as precise because reading the meniscus, parallax, and the tolerances between graduations introduce more error. A beaker is a general container with rough volume markings and is used more for mixing or rough pours, not for exact transfers. A funnel’s job is to guide liquid into a container, not to measure or dispense precise volumes.

So, for measuring and pouring an exact amount, the volumetric pipet is the best choice.