Multiple choice

Which of the following instruments is used to measure the density of a liquid?

  1. Calorimeter

  2. Salinometer

  3. Hydrometer

  4. None of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A hydrometer is an instrument specifically designed to measure the density (or specific gravity) of liquids, floating higher in denser liquids and lower in less dense ones based on Archimedes' principle. It is commonly used to test battery fluid, urine specific gravity, and alcohol concentration in brewing.

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