Glassware used to accurately transfer small variable volumes is:

• A. Graduated (Mohr) Pipet
• B. Volumetric Pipet
• C. Buret
• D. Beaker

Answer: (A)

When you need to move a small amount of liquid where the exact volume can vary, the key tool is a graded pipette with marks along its length. A graduated (Mohr) pipette is designed for this: you read the volume from the scale at the bottom of the meniscus and then deliver that chosen amount. Because you can select different graduations, it handles a range of small volumes with good accuracy, making it ideal for transferring variable amounts in routine procedures.

A volumetric pipette, by contrast, is built to deliver one precise volume and isn’t meant for choosing different amounts each time. A buret can also deliver variable volumes precisely and is excellent for titrations, but it’s larger and more specialized for controlled additions during an analysis rather than simple transfer of varying small amounts. Beakers are basic containers with only rough volume estimates, so they’re not suitable when accuracy is important.