Question

Pick the TWO true statements from the following: Graduated cylinders are used to measure volume. All graduated cylinders measure liquids with the same precision. Graduated cylinders are the only instruments used to measure volume in the laboratory. Always read a graduated cylinder from the bottom of the meniscus.

Answer 1

Answer:

• Graduated cylinders are used to measure volume

• Always read a graduated cylinder from the bottom of the meniscus

Explanation:

Graduated cylinder (also called measuring cylinder) is a laboratory equipment (usually made from glass or sometimes rubber or plastic) used to measure the volume of liquids in the laboratory. They are of different precisions/calibrations; while each line in some represent 0.1 milliliter (ml) or cubic centimeter (cm³), each line in some other represent 0.1 centiliter (cl) hence their precisions are different as those measured in the milliliter graduated cylinder are more precise and give more accurate measurements than those measured in the centiliter graduated cylinder. When taking readings from the graduated cylinder, the liquid is allowed to settle in the cylinder and the lower meniscus is read to be the volume of the liquid (for accurate measurement, avoid parallax error).

There are however other glass-wares/equipment used to measure volume in the laboratory. Examples include pipette, burette and volumetric flask.

Answer 2

- Graduated cylinders are used to measure volume.
- Always read a graduated cylinder from the bottom of the meniscus.