Which of the following laboratory items is an Erlenmeyer flask?

• A. A round-bottomed glass container used for heating liquids
• B. A shallow, circular dish commonly used for culturing microorganisms
• C. A cylindrical glass tube with graduations and an open top
• D. A conical glass vessel with a narrow neck and flat bottom

Answer: (D)

Verified step by step guidance

1. Understand the purpose of the question: it asks to identify which description matches an Erlenmeyer flask.
2. Recall the characteristics of an Erlenmeyer flask: it is a conical-shaped glass container with a narrow neck and a flat bottom, commonly used in laboratories for mixing and heating liquids.
3. Review each option and compare it to the known features of an Erlenmeyer flask:
4. - A round-bottomed glass container is typically a boiling flask, not an Erlenmeyer flask.
5. - A shallow, circular dish is a Petri dish, used for culturing microorganisms.
6. - A cylindrical glass tube with graduations and an open top is a graduated cylinder, used for measuring liquid volumes.
7. - A conical glass vessel with a narrow neck and flat bottom matches the description of an Erlenmeyer flask.