Question

A hydrometer is usually made of glass and consists of cylindrical stem and a ______.

• A. bulb weighted
• B. float
• C. valve
• D. weightless bulb

Hint:

A hydrometer measures liquid density by floating in the liquid and reading the scale on the stem.

Answer 1

The Correct Option is B

A hydrometer, a device for measuring liquid specific gravity, features a cylindrical stem with a buoyant component that allows it to float and indicate liquid density. Therefore, "float" is the correct selection.