Which of the following is the most accurate device for measuring 30 ml of diphenhydramine? cylindrical graduate. conical graduate. beaker. a 2 oz cup.

Cylindrical graduate
The most accurate device for measuring volume of liquids is the graduated cylinders or cylindrical graduate. This is a thin glass tubes that provide straightforward reading of liquids and in order to attain the correct measurement, the liquid must be pour down at the center of the graduate especially for viscous liquids and the final volume must be determined by aligning the bottom of the meniscus with the desired graduation mark. For densely colored or opaque liquids, the top of the meniscus should be read.