Which item is used for distillation, reflux setups and laboratory-scale synthesis?

• A. Beaker
• B. Graduated Cylinder
• C. Round Bottom Flask
• D. Erlenmeyer Flask

Answer: (C)

Distillation and reflux setups require a vessel that can be heated evenly and securely connect to condensers and other glassware. The round bottom flask fits this need because its curved surface distributes heat more uniformly when placed in a heating mantle, reducing hot spots. Its round body also allows a good seal with standard ground-glass joints, enabling easy attachment to condensers and adapters to create a closed reflux or distillation system. This makes it ideal for laboratory-scale synthesis, where controlled heating and modular connections are important. By contrast, a beaker is designed for mixing and lacks secure connections to a condenser; a graduated cylinder is for precise measuring rather than heating or attachment to glassware; an Erlenmeyer flask has a narrow neck that doesn’t distribute heat as evenly or provide the best interface for distillation equipment.