Which will achieve more accurate results: cylinder or conical?

• A. Conical
• B. Cylinder
• C. Both equally accurate
• D. Neither

Answer: (B)

When you’re measuring a liquid’s volume, the relationship between the height of the liquid and the actual volume matters. A cylinder has a constant cross-sectional area, so the volume is directly proportional to the liquid height (V = A × h). That means reading the meniscus at a graduation translates to a precise, predictable change in volume, with fewer ambiguous readings.

A conical (Erlenmeyer) flask widens as you go up, so the cross-sectional area changes with height. The same vertical change in height doesn’t correspond to a consistent change in volume, making readings less direct and more sensitive to exactly where the meniscus sits. Fewer precise graduations and the curved interior can also make the measurement harder to read accurately. All of this leads to less accurate results with a conical flask compared to a cylinder.

So, for more accurate volume measurements, the cylinder is the better choice.